diff --git a/CLAUDE.md b/CLAUDE.md
index e019023..4498fb6 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -417,10 +417,34 @@ scheduled_inspections:
     id, facility_id (FK→facilities CASCADE), template_id (FK→inspection_templates CASCADE),
     inspector_id (FK→users SET NULL), frequency ENUM('once','daily','weekly','monthly'),
     next_due_date DATE, active BOOL, notes TEXT, created_by, created_at,
-    last_completed_at DATETIME, advance_notified BOOL, due_notified BOOL, overdue_notified BOOL
+    last_completed_at DATETIME, advance_notified BOOL, due_notified BOOL, overdue_notified BOOL,
+    weekdays VARCHAR(20) nullable,       -- Phase 43: CSV weekday ints, Mon=0, e.g. '0,2,4'
+    month_mode VARCHAR(20) nullable,     -- Phase 43: 'day_of_month' | 'nth_weekday'
+    day_of_month SMALLINT nullable,      -- Phase 43
+    nth_week SMALLINT nullable,          -- Phase 43: 1–5, or -1 = last
+    nth_weekday SMALLINT nullable        -- Phase 43: 0–6, Mon=0
 inspections.scheduled_inspection_id  FK→scheduled_inspections SET NULL   ← Phase 36
 ```
 
+**Recurrence detail (Phase 43).** `frequency` says *how often*; these columns say *which day*:
+
+| frequency | columns used | example |
+|---|---|---|
+| `once` / `daily` | none (all NULL) | — |
+| `weekly` | `weekdays` | `'0,2,4'` → Mon/Wed/Fri |
+| `monthly` + `month_mode='day_of_month'` | `day_of_month` | the 15th (clamped to the month's last day) |
+| `monthly` + `month_mode='nth_weekday'` | `nth_week`, `nth_weekday` | 2nd Tuesday (`nth_week=-1` → last) |
+
+All are nullable and **legacy phase36 rows keep NULLs**, falling back to `_add_interval()`'s "+7 days" / "same day next month" — no schedule changes cadence on deploy. `_apply_recurrence()` (in the blueprint) **clears the columns that don't apply** to the chosen frequency, so a weekly→monthly switch can't leave stale weekdays behind.
+
+- `ScheduledInspection.next_occurrence_after(d)` — first occurrence strictly after `d`, honouring the rule. Used by `fulfill()`; a Mon/Wed/Fri schedule rolls Mon→Wed→Fri→Mon, so **one row yields three inspections a week**.
+- `align_due_date(d)` — snaps the manager's picked start date forward to the first matching day (pick a Tuesday for Mon/Wed/Fri → get that Wednesday). Applied on both create and edit.
+- `recurrence_label` — display string (`"Weekly · Mon, Wed, Fri"`), shown on the schedule list and the dashboard panel in place of the bare `frequency_label`.
+- `weekday_list` / `set_weekdays()` — parse/format the CSV column. `ScheduledInspectionForm(obj=sched)` copies the raw CSV into the multi-select, so the edit route re-assigns `form.weekdays.data = sched.weekday_list` on GET.
+- A requested 5th weekday that doesn't exist in a month falls back to the 4th; `day_of_month=31` clamps to Feb 28/29. Every month yields a valid date.
+
+**Duplicate-Start guard.** `start()` returns the existing `in_progress` inspection for the schedule instead of creating a second one, and both the schedule list and the dashboard panel show **Continue** (via `_open_inspection_ids()`) rather than **Start** while one is underway.
+
 **A plan, not an inspection.** Names a facility + template + assigned inspector + `next_due_date`. Lifecycle:
 - The assigned inspector (or a manager) clicks **Start** → `scheduled_inspections.start` creates a normal `in_progress` Inspection with `scheduled_inspection_id` set, then redirects to the execute flow.
 - On **completion** (execute route, status → `completed`), `ScheduledInspection.fulfill()` runs in the same atomic commit: `once` → `active=False`; recurring → `next_due_date` rolls forward past today via `_add_interval()` and the three `*_notified` flags reset.
@@ -827,7 +851,18 @@ phase1_projects_roles → phase6_features → phase7_mobile_api → phase8_notif
                                                                                                                 → phase39_area_public_token
                                                                                                                     → phase40_auditor_role
                                                                                                                         → phase41_internal_handler
-                                                                                                                            → phase42_internal_contact   ← HEAD
+                                                                                                                            → phase42_internal_contact
+                                                                                → phase43_sched_recurrence   ← HEAD
+```
+
+### phase43_sched_recurrence
+
+Revision id `phase43_sched_recurrence`. Adds the five nullable recurrence-detail columns to `scheduled_inspections` (`weekdays`, `month_mode`, `day_of_month`, `nth_week`, `nth_weekday`) so weekly schedules can name their weekdays and monthly schedules can use either a day-of-month or an nth-weekday rule — see §5 `ScheduledInspection`. **No backfill**: existing rows keep NULLs and retain their current cadence. `month_mode` is VARCHAR, not ENUM, so a future recurrence style needs no 3-step ENUM migration (rule 3). `INFORMATION_SCHEMA` column-existence checks — safe to re-run.
+
+**Deploy order:**
+```bash
+flask db upgrade
+sudo systemctl restart gunicorn
 ```
 
 ### phase21_performance_indexes
@@ -1353,6 +1388,7 @@ timeout = 30
 | 78 | **`PATCH /api/v1/issues/<id>/handler` allows the inspector on purpose — do NOT align it to the web form's admin/director/PM restriction** | The iPad lets the assigned inspector set "Handled By" from the field, scoped via `get_inspector_scope()` (403 if the issue's facility isn't contracted). This is a deliberate divergence from the web form. `_issue_payload()` must keep returning all handler fields (`handler_type`, `handler_label`, `facility_handler_*`, `vendor_*`, `internal_handler_name`, `internal_handler_contact`) or the iPad's "Handled By" panel silently blanks — same failure mode as rule 40. |
 | 79 | **`auditor` = `project_manager` access + issue management, minus delete — keep the two decorators distinct** | Auditor is added to `@project_manager_required` (PM baseline) and to every `project_manager` role check in routes/templates. Its *extra* issue powers (verify/bulk-verify/verification-queue) go through the separate `@issue_manager_required` (admin/director/auditor). Issue **delete** stays `@supervisor_required` — never add auditor there. When adding a new PM-level gate, include `auditor`; when adding a director-only or delete-level gate, do not. The three issue **delete** template gates (spaced `['admin', 'director']` in `issues/list.html` + `issues/view.html`) are deliberately left without auditor. Auditor is also in the `_ALLOWED_ROLES` set of every `app/api/*` module — a **new** API blueprint's `_ALLOWED_ROLES` must include `auditor` for PM parity. |
 | 80 | **Assignee dropdowns are `director`/`inspector`/`auditor` (admin removed, auditor added)** | The issue/inspection assignee `<select>`s query `User.role.in_([...])` — admin was removed and auditor added (the inspection flag-issue list also keeps `project_manager`). These lists control who can be *assigned*, distinct from who can *edit*. The issue-update route (`issues.view`) defensively appends any current `assigned_to` who is not in the set (e.g. a legacy admin assignment) to `form.assigned_to.choices` so saving the form never silently unassigns them. Do not remove that guard. |
+| 82 | **A schedule's recurrence columns must be CLEARED when they don't apply to the chosen frequency** | `_apply_recurrence()` in `routes/scheduled_inspections.py` is the single write path for `frequency` + `weekdays`/`month_mode`/`day_of_month`/`nth_week`/`nth_weekday`, and it NULLs the blocks that don't apply. Setting `sched.frequency` directly (as create/edit used to) leaves stale settings behind — a weekly→monthly switch would keep `weekdays` and `recurrence_label` would lie. The hidden form blocks still POST their values, so client-side hiding is not enough. |
 | 81 | **Photo timestamp/geo overlay is burned at UPLOAD, never on `PATCH /issues/<id>/photos`** | That PATCH receives only path strings — the bytes are already in storage and the payload carries no capture metadata. Burning there would need a read-modify-write per key plus an overwrite-in-place primitive (`storage.save()` mints a NEW uuid key, and §22 requires key == DB path), and would risk a **double burn** since the endpoint is deliberately idempotent/retry-safe (rule 45). Stamp in `POST /photos/upload`, where the raw bytes + EXIF are in hand and each call writes exactly one already-stamped object. Stamping failures must always fall back to storing the ORIGINAL bytes — never lose a photo to a stamping bug. See §23. |
 
 ---
diff --git a/app/api/scheduled.py b/app/api/scheduled.py
index 63898ed..e6cd533 100644
--- a/app/api/scheduled.py
+++ b/app/api/scheduled.py
@@ -42,6 +42,14 @@ def _scheduled_payload(s):
         'inspector_id':    s.inspector_id,
         'frequency':       s.frequency,
         'frequency_label': s.frequency_label,
+        # phase43 recurrence detail. `recurrence_label` is the display string
+        # ("Weekly · Mon, Wed, Fri"); the raw fields let the iPad render its own.
+        'recurrence_label': s.recurrence_label,
+        'weekdays':         s.weekday_list,
+        'month_mode':       s.month_mode,
+        'day_of_month':     s.day_of_month,
+        'nth_week':         s.nth_week,
+        'nth_weekday':      s.nth_weekday,
         'next_due_date':   s.next_due_date.isoformat() if s.next_due_date else None,
         'is_overdue':      s.is_overdue(),
         'notes':           s.notes or None,
diff --git a/app/models/scheduled_inspection.py b/app/models/scheduled_inspection.py
index 15ed236..4f74e32 100644
--- a/app/models/scheduled_inspection.py
+++ b/app/models/scheduled_inspection.py
@@ -19,13 +19,56 @@ The *_notified flags make each of those fire at most once per occurrence and
 reset when a recurring schedule rolls forward.
 """
 
-from datetime import timedelta
+import calendar
+from datetime import date, timedelta
+
 from app import db
 from app.utils.time_utils import now_eastern
 
 
 FREQUENCY_CHOICES = ('once', 'daily', 'weekly', 'monthly')
 
+# Monthly recurrence styles (phase43). Stored as VARCHAR, not ENUM, so adding a
+# style later needs no 3-step MySQL ENUM dance (CLAUDE.md rule 3).
+MONTH_MODE_DAY = 'day_of_month'    # "the 15th of every month"
+MONTH_MODE_NTH = 'nth_weekday'     # "the 2nd Tuesday of every month"
+
+# Python weekday numbering: Monday=0 … Sunday=6 (matches date.weekday()).
+WEEKDAY_NAMES  = ('Monday', 'Tuesday', 'Wednesday', 'Thursday',
+                  'Friday', 'Saturday', 'Sunday')
+WEEKDAY_ABBREV = ('Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun')
+
+# nth_week: 1–4 are literal, 5 means "5th (or last if the month is short)",
+# -1 means "last" explicitly.
+NTH_WEEK_LABELS = {1: '1st', 2: '2nd', 3: '3rd', 4: '4th', 5: '5th', -1: 'Last'}
+
+
+def _last_day_of(year, month):
+    return calendar.monthrange(year, month)[1]
+
+
+def _shift_month(year, month, n=1):
+    """Return (year, month) shifted by *n* months."""
+    idx = year * 12 + (month - 1) + n
+    return idx // 12, idx % 12 + 1
+
+
+def _nth_weekday_of(year, month, weekday, nth):
+    """Date of the *nth* *weekday* in a month.
+
+    ``nth == -1`` means the last one. A requested 5th occurrence that does not
+    exist falls back to the 4th, so every month yields a valid date.
+    """
+    last = _last_day_of(year, month)
+    if nth == -1:
+        d = date(year, month, last)
+        return d - timedelta(days=(d.weekday() - weekday) % 7)
+    first = date(year, month, 1)
+    day = 1 + ((weekday - first.weekday()) % 7) + (nth - 1) * 7
+    while day > last:
+        day -= 7
+    return date(year, month, day)
+
 
 class ScheduledInspection(db.Model):
     __tablename__ = 'scheduled_inspections'
@@ -45,6 +88,18 @@ class ScheduledInspection(db.Model):
     active        = db.Column(db.Boolean, nullable=False, default=True)
     notes         = db.Column(db.Text, nullable=True)
 
+    # ── Recurrence detail (phase43) ──────────────────────────────────────────
+    # weekly  : CSV of Python weekday ints, e.g. '0,2,4' = Mon/Wed/Fri.
+    #           NULL/empty falls back to the legacy "every 7 days" behaviour.
+    # monthly : month_mode picks which pair of columns applies —
+    #           MONTH_MODE_DAY → day_of_month;  MONTH_MODE_NTH → nth_week + nth_weekday.
+    #           NULL falls back to the legacy "same day next month" behaviour.
+    weekdays     = db.Column(db.String(20), nullable=True)
+    month_mode   = db.Column(db.String(20), nullable=True)
+    day_of_month = db.Column(db.SmallInteger, nullable=True)
+    nth_week     = db.Column(db.SmallInteger, nullable=True)
+    nth_weekday  = db.Column(db.SmallInteger, nullable=True)
+
     created_by        = db.Column(db.Integer, db.ForeignKey('users.id', ondelete='SET NULL'),
                                   nullable=True)
     created_at        = db.Column(db.DateTime, nullable=False, default=now_eastern)
@@ -72,22 +127,102 @@ class ScheduledInspection(db.Model):
     def frequency_label(self):
         return self.FREQUENCY_LABELS.get(self.frequency, self.frequency)
 
+    # ── Recurrence accessors ─────────────────────────────────────────────────
+
+    @property
+    def weekday_list(self):
+        """Selected weekdays as a sorted list of ints (Mon=0). [] if unset."""
+        if not self.weekdays:
+            return []
+        out = set()
+        for part in str(self.weekdays).split(','):
+            part = part.strip()
+            if part.lstrip('-').isdigit() and 0 <= int(part) <= 6:
+                out.add(int(part))
+        return sorted(out)
+
+    def set_weekdays(self, values):
+        """Store an iterable of weekday ints as the CSV column (None if empty)."""
+        clean = sorted({int(v) for v in (values or []) if 0 <= int(v) <= 6})
+        self.weekdays = ','.join(str(v) for v in clean) or None
+
+    @property
+    def recurrence_label(self):
+        """Human summary of the recurrence rule, e.g. 'Weekly · Mon, Wed, Fri'."""
+        base = self.frequency_label
+        if self.frequency == 'weekly':
+            days = self.weekday_list
+            if days:
+                return f"{base} · {', '.join(WEEKDAY_ABBREV[d] for d in days)}"
+        elif self.frequency == 'monthly':
+            if self.month_mode == MONTH_MODE_NTH and self.nth_week and self.nth_weekday is not None:
+                nth = NTH_WEEK_LABELS.get(self.nth_week, str(self.nth_week))
+                return f'{base} · {nth} {WEEKDAY_NAMES[self.nth_weekday]}'
+            if self.day_of_month:
+                return f'{base} · day {self.day_of_month}'
+        return base
+
+    # ── Date arithmetic ──────────────────────────────────────────────────────
+
     @staticmethod
     def _add_interval(d, frequency):
-        """Return d advanced by one interval of the given frequency."""
+        """Return d advanced by one plain interval of *frequency*.
+
+        Fallback used when no day-of-week / day-of-month detail is configured
+        (legacy phase36 rows). Prefer :meth:`next_occurrence_after`.
+        """
         if frequency == 'daily':
             return d + timedelta(days=1)
         if frequency == 'weekly':
             return d + timedelta(weeks=1)
         if frequency == 'monthly':
-            # Add ~1 month by stepping 28–31 days to the same day-of-month where possible.
-            month = d.month + 1
-            year  = d.year + (1 if month > 12 else 0)
-            month = 1 if month > 12 else month
-            day   = min(d.day, 28)   # clamp to avoid invalid dates (e.g. Feb 30)
-            return d.replace(year=year, month=month, day=day)
+            year, month = _shift_month(d.year, d.month, 1)
+            return date(year, month, min(d.day, _last_day_of(year, month)))
         return d  # 'once' has no next interval
 
+    def next_occurrence_after(self, d):
+        """First occurrence strictly after date *d*, honouring the day rules."""
+        if self.frequency == 'weekly':
+            days = self.weekday_list
+            if days:
+                for step in range(1, 8):
+                    cand = d + timedelta(days=step)
+                    if cand.weekday() in days:
+                        return cand
+        elif self.frequency == 'monthly':
+            year, month = _shift_month(d.year, d.month, 1)
+            if self.month_mode == MONTH_MODE_NTH and self.nth_week and self.nth_weekday is not None:
+                return _nth_weekday_of(year, month, self.nth_weekday, self.nth_week)
+            if self.day_of_month:
+                return date(year, month, min(self.day_of_month, _last_day_of(year, month)))
+        return self._add_interval(d, self.frequency)
+
+    def align_due_date(self, d):
+        """Snap *d* forward to the first date on/after it that fits the rule.
+
+        Lets a manager pick any start date and still get, say, Mon/Wed/Fri:
+        picking a Tuesday for a Mon/Wed/Fri schedule yields that Wednesday.
+        """
+        if self.frequency == 'weekly':
+            days = self.weekday_list
+            if days:
+                for step in range(0, 7):
+                    cand = d + timedelta(days=step)
+                    if cand.weekday() in days:
+                        return cand
+        elif self.frequency == 'monthly':
+            if self.month_mode == MONTH_MODE_NTH and self.nth_week and self.nth_weekday is not None:
+                cand = _nth_weekday_of(d.year, d.month, self.nth_weekday, self.nth_week)
+            elif self.day_of_month:
+                cand = date(d.year, d.month,
+                            min(self.day_of_month, _last_day_of(d.year, d.month)))
+            else:
+                return d
+            if cand < d:
+                return self.next_occurrence_after(cand)
+            return cand
+        return d
+
     def is_overdue(self, today=None):
         today = today or now_eastern().date()
         return self.active and self.next_due_date < today
@@ -102,10 +237,10 @@ class ScheduledInspection(db.Model):
             return
         # Recurring: advance until the next due date is in the future.
         today = now_eastern().date()
-        nxt = self._add_interval(self.next_due_date, self.frequency)
+        nxt = self.next_occurrence_after(self.next_due_date)
         guard = 0
         while nxt <= today and guard < 400:
-            nxt = self._add_interval(nxt, self.frequency)
+            nxt = self.next_occurrence_after(nxt)
             guard += 1
         self.next_due_date = nxt
         self.advance_notified = False
diff --git a/app/routes/dashboard.py b/app/routes/dashboard.py
index ab5814e..dc747d6 100644
--- a/app/routes/dashboard.py
+++ b/app/routes/dashboard.py
@@ -361,8 +361,10 @@ def index():
     # ── Scheduled inspections (phase36): upcoming / overdue ──────────────
     sched_upcoming = []
     sched_overdue_count = 0
+    sched_open_inspections = {}
     if not is_customer:
         from app.models.scheduled_inspection import ScheduledInspection
+        from app.routes.scheduled_inspections import _open_inspection_ids
         _today = now.date()
         _sq = ScheduledInspection.query.filter_by(active=True)
         if is_inspector:
@@ -374,11 +376,14 @@ def index():
             s for s in _all_sched
             if _today <= s.next_due_date <= _today + timedelta(days=7)
         ][:8]
+        # Offer Continue (not a duplicate Start) where one is already underway.
+        sched_open_inspections = _open_inspection_ids(sched_upcoming)
 
     return render_template(
         'dashboard.html',
         sched_upcoming       = sched_upcoming,
         sched_overdue_count  = sched_overdue_count,
+        sched_open_inspections = sched_open_inspections,
         submitted_this_week  = submitted_this_week,
         completed_today      = completed_today,
         open_issues          = open_issues,
diff --git a/app/routes/scheduled_inspections.py b/app/routes/scheduled_inspections.py
index 88a070a..f0d9d7c 100644
--- a/app/routes/scheduled_inspections.py
+++ b/app/routes/scheduled_inspections.py
@@ -22,7 +22,8 @@ from flask import (Blueprint, render_template, redirect, url_for, flash,
 from flask_login import login_required, current_user
 
 from app import db
-from app.models.scheduled_inspection import ScheduledInspection
+from app.models.scheduled_inspection import (ScheduledInspection,
+                                              MONTH_MODE_DAY, MONTH_MODE_NTH)
 from app.models.facility import Facility
 from app.models.inspection import Inspection, InspectionTemplate
 from app.models.project import Project
@@ -79,6 +80,50 @@ def _notify_assignee(sched, reassigned=False):
     )
 
 
+def _apply_recurrence(sched, form):
+    """Copy the recurrence block for the chosen frequency onto *sched* and
+    clear the blocks that no longer apply, then snap next_due_date onto the
+    rule. Keeping the unused columns NULL means `recurrence_label` and the
+    date math never read stale settings after a frequency change."""
+    sched.frequency = form.frequency.data
+
+    if sched.frequency == 'weekly':
+        sched.set_weekdays(form.weekdays.data)
+    else:
+        sched.weekdays = None
+
+    if sched.frequency == 'monthly':
+        sched.month_mode = form.month_mode.data or MONTH_MODE_DAY
+        if sched.month_mode == MONTH_MODE_NTH:
+            sched.day_of_month = None
+            sched.nth_week     = form.nth_week.data
+            sched.nth_weekday  = form.nth_weekday.data
+        else:
+            sched.day_of_month = form.day_of_month.data
+            sched.nth_week     = None
+            sched.nth_weekday  = None
+    else:
+        sched.month_mode = sched.day_of_month = None
+        sched.nth_week = sched.nth_weekday = None
+
+    # Snap the picked date forward onto the first matching occurrence.
+    sched.next_due_date = sched.align_due_date(form.next_due_date.data)
+
+
+def _open_inspection_ids(schedules):
+    """{schedule_id: inspection_id} for schedules with an inspection already
+    in progress, so the UI offers Continue instead of a duplicate Start."""
+    ids = [s.id for s in schedules if s.id]
+    if not ids:
+        return {}
+    rows = (Inspection.query
+            .filter(Inspection.scheduled_inspection_id.in_(ids),
+                    Inspection.status == 'in_progress')
+            .order_by(Inspection.id.desc())
+            .all())
+    return {r.scheduled_inspection_id: r.id for r in rows}
+
+
 def _selected_project_id(form):
     """Contract of the submitted facility (for restoring the selector on
     re-render), or None."""
@@ -110,7 +155,8 @@ def index():
     ).all()
 
     return render_template('scheduled_inspections/list.html',
-                           schedules=schedules, today=today)
+                           schedules=schedules, today=today,
+                           open_inspections=_open_inspection_ids(schedules))
 
 
 # ── Create ──────────────────────────────────────────────────────────────────
@@ -129,17 +175,18 @@ def create():
             facility_id   = form.facility_id.data,
             template_id   = form.template_id.data,
             inspector_id  = form.inspector_id.data,
-            frequency     = form.frequency.data,
             next_due_date = form.next_due_date.data,
             notes         = (form.notes.data or '').strip() or None,
             active        = form.active.data,
             created_by    = current_user.id,
         )
+        _apply_recurrence(sched, form)
         db.session.add(sched)
         db.session.commit()
         log_action(ACTION_CREATE, 'ScheduledInspection', sched.id,
                    f'{sched.template.name} @ {sched.facility.name}',
-                   f'freq={sched.frequency}; due={sched.next_due_date}; inspector={sched.inspector_id}')
+                   f'freq={sched.recurrence_label}; due={sched.next_due_date}; '
+                   f'inspector={sched.inspector_id}')
         logger.info('SCHED INSP | create | by=%s | id=%s', current_user.username, sched.id)
 
         # Notify the assigned inspector immediately.
@@ -166,20 +213,25 @@ def edit(schedule_id):
         abort(404)
     form = ScheduledInspectionForm(obj=sched)
     _populate_choices(form)
+    if request.method == 'GET':
+        # obj= copies the raw CSV column into a multi-select field; hand it the
+        # parsed int list instead so the checkboxes pre-tick correctly.
+        form.weekdays.data   = sched.weekday_list
+        form.month_mode.data = sched.month_mode or MONTH_MODE_DAY
 
     if form.validate_on_submit():
         old_inspector_id = sched.inspector_id
         sched.facility_id   = form.facility_id.data
         sched.template_id   = form.template_id.data
         sched.inspector_id  = form.inspector_id.data
-        sched.frequency     = form.frequency.data
-        sched.next_due_date = form.next_due_date.data
         sched.notes         = (form.notes.data or '').strip() or None
         sched.active        = form.active.data
+        _apply_recurrence(sched, form)
         db.session.commit()
         log_action(ACTION_UPDATE, 'ScheduledInspection', sched.id,
                    f'{sched.template.name} @ {sched.facility.name}',
-                   f'freq={sched.frequency}; due={sched.next_due_date}; active={sched.active}')
+                   f'freq={sched.recurrence_label}; due={sched.next_due_date}; '
+                   f'active={sched.active}')
 
         # Notify the inspector if the assignment changed to them.
         if sched.active and sched.inspector_id and sched.inspector_id != old_inspector_id:
@@ -242,6 +294,16 @@ def start(schedule_id):
         flash('The template for this schedule has no form fields yet.', 'warning')
         return redirect(url_for('scheduled_inspections.index'))
 
+    # Already started but not submitted? Resume it rather than opening a second
+    # inspection against the same occurrence.
+    existing = (Inspection.query
+                .filter_by(scheduled_inspection_id=sched.id, status='in_progress')
+                .order_by(Inspection.id.desc())
+                .first())
+    if existing is not None:
+        flash('Resuming the inspection you already started for this schedule.', 'info')
+        return redirect(url_for('inspections.execute', inspection_id=existing.id))
+
     inspection = Inspection(
         template_id             = sched.template_id,
         facility_id             = sched.facility_id,
diff --git a/app/templates/dashboard.html b/app/templates/dashboard.html
index b275bcb..2a79d73 100644
--- a/app/templates/dashboard.html
+++ b/app/templates/dashboard.html
@@ -48,7 +48,7 @@
     <div class="table-responsive">
       <table class="table table-sm table-hover mb-0 align-middle">
         <thead class="table-light">
-          <tr><th>Facility</th><th>Template</th><th>Inspector</th><th>Due</th><th></th></tr>
+          <tr><th>Facility</th><th>Template</th><th>Inspector</th><th>Repeats</th><th>Due</th><th></th></tr>
         </thead>
         <tbody>
           {% for s in sched_upcoming %}
@@ -56,13 +56,21 @@
             <td>{{ s.facility.name if s.facility else '—' }}</td>
             <td class="small">{{ s.template.name if s.template else '—' }}</td>
             <td class="small">{{ s.inspector.display_name if s.inspector else '—' }}</td>
+            <td class="small text-muted">{{ s.recurrence_label }}</td>
             <td class="small">{{ s.next_due_date.strftime('%b %d') }}</td>
             <td class="text-end">
               {# Start is shown only to the assignee — the inspection is theirs to do. #}
               {% if s.inspector_id and s.inspector_id == current_user.id %}
+              {% set open_id = sched_open_inspections.get(s.id) %}
+              {% if open_id %}
+              <a href="{{ url_for('inspections.execute', inspection_id=open_id) }}"
+                 class="btn btn-sm btn-warning py-0" title="You already started this — resume it">
+                <i class="bi bi-pencil-square"></i> Continue</a>
+              {% else %}
               <a href="{{ url_for('scheduled_inspections.start', schedule_id=s.id) }}"
                  class="btn btn-sm btn-success py-0"><i class="bi bi-play-fill"></i> Start</a>
               {% endif %}
+              {% endif %}
             </td>
           </tr>
           {% endfor %}
diff --git a/app/templates/scheduled_inspections/form.html b/app/templates/scheduled_inspections/form.html
index 410e35d..43bd32c 100644
--- a/app/templates/scheduled_inspections/form.html
+++ b/app/templates/scheduled_inspections/form.html
@@ -49,6 +49,64 @@
               {{ form.next_due_date.label(class="form-label fw-semibold") }}
               {{ form.next_due_date(class="form-control", type="date") }}
               {% for e in form.next_due_date.errors %}<div class="text-danger small">{{ e }}</div>{% endfor %}
+              <div class="form-text">Snapped forward to the first matching day.</div>
+            </div>
+          </div>
+
+          {# ── Weekly: which days of the week ──────────────────────────── #}
+          <div class="mb-3 p-3 rounded bg-light border" id="weekly_block" hidden>
+            <label class="form-label fw-semibold d-block">{{ form.weekdays.label.text }}</label>
+            <div class="d-flex flex-wrap gap-3">
+              {% for value, label in form.weekdays.choices %}
+              <div class="form-check">
+                <input class="form-check-input" type="checkbox" name="weekdays"
+                       id="weekday_{{ value }}" value="{{ value }}"
+                       {% if form.weekdays.data and value in form.weekdays.data %}checked{% endif %}>
+                <label class="form-check-label" for="weekday_{{ value }}">{{ label[:3] }}</label>
+              </div>
+              {% endfor %}
+            </div>
+            {% for e in form.weekdays.errors %}<div class="text-danger small">{{ e }}</div>{% endfor %}
+            <div class="form-text mb-0">
+              Pick every day the inspection recurs — e.g. Mon, Wed, Fri gives three
+              inspections a week. The due date rolls to the next selected day each
+              time one is submitted.
+            </div>
+          </div>
+
+          {# ── Monthly: day-of-month OR nth weekday ────────────────────── #}
+          <div class="mb-3 p-3 rounded bg-light border" id="monthly_block" hidden>
+            <label class="form-label fw-semibold d-block">{{ form.month_mode.label.text }}</label>
+
+            <div class="form-check">
+              <input class="form-check-input" type="radio" name="month_mode"
+                     id="month_mode_day" value="day_of_month"
+                     {% if form.month_mode.data != 'nth_weekday' %}checked{% endif %}>
+              <label class="form-check-label" for="month_mode_day">On a day of the month</label>
+            </div>
+            <div class="ms-4 mb-2" id="dom_row">
+              <div class="input-group input-group-sm" style="max-width:16rem;">
+                <span class="input-group-text">Day</span>
+                {{ form.day_of_month(class="form-control", type="number", min=1, max=31,
+                                     placeholder="15") }}
+              </div>
+              {% for e in form.day_of_month.errors %}<div class="text-danger small">{{ e }}</div>{% endfor %}
+              <div class="form-text mb-0">Months without that day use their last day.</div>
+            </div>
+
+            <div class="form-check">
+              <input class="form-check-input" type="radio" name="month_mode"
+                     id="month_mode_nth" value="nth_weekday"
+                     {% if form.month_mode.data == 'nth_weekday' %}checked{% endif %}>
+              <label class="form-check-label" for="month_mode_nth">On a weekday of the month</label>
+            </div>
+            <div class="ms-4" id="nth_row">
+              <div class="d-flex gap-2 flex-wrap" style="max-width:24rem;">
+                {{ form.nth_week(class="form-select form-select-sm", style="max-width:7rem;") }}
+                {{ form.nth_weekday(class="form-select form-select-sm", style="max-width:11rem;") }}
+              </div>
+              {% for e in form.nth_week.errors %}<div class="text-danger small">{{ e }}</div>{% endfor %}
+              <div class="form-text mb-0">e.g. the 2nd Tuesday of every month.</div>
             </div>
           </div>
 
@@ -129,5 +187,40 @@
     setPlaceholder();
   }
 }());
+
+// Recurrence blocks: only the one matching the chosen frequency is shown.
+// The server clears the columns for the hidden blocks on save, so stale values
+// left in the DOM never take effect.
+(function () {
+  'use strict';
+  var freq    = document.getElementById('frequency') ||
+                document.querySelector('[name="frequency"]');
+  var weekly  = document.getElementById('weekly_block');
+  var monthly = document.getElementById('monthly_block');
+  if (!freq || !weekly || !monthly) { return; }
+
+  var domRadio = document.getElementById('month_mode_day');
+  var nthRadio = document.getElementById('month_mode_nth');
+  var domRow   = document.getElementById('dom_row');
+  var nthRow   = document.getElementById('nth_row');
+
+  function syncMonthMode() {
+    var useNth = nthRadio && nthRadio.checked;
+    domRow.style.opacity = useNth ? '.45' : '1';
+    nthRow.style.opacity = useNth ? '1' : '.45';
+  }
+
+  function syncFrequency() {
+    weekly.hidden  = freq.value !== 'weekly';
+    monthly.hidden = freq.value !== 'monthly';
+    syncMonthMode();
+  }
+
+  freq.addEventListener('change', syncFrequency);
+  [domRadio, nthRadio].forEach(function (r) {
+    if (r) { r.addEventListener('change', syncMonthMode); }
+  });
+  syncFrequency();
+}());
 </script>
 {% endblock %}
diff --git a/app/templates/scheduled_inspections/list.html b/app/templates/scheduled_inspections/list.html
index 635def4..601a166 100644
--- a/app/templates/scheduled_inspections/list.html
+++ b/app/templates/scheduled_inspections/list.html
@@ -43,7 +43,7 @@
             <td><strong>{{ s.facility.name if s.facility else '—' }}</strong></td>
             <td>{{ s.template.name if s.template else '—' }}</td>
             <td>{{ s.inspector.display_name if s.inspector else '— Unassigned —' }}</td>
-            <td><span class="badge bg-secondary">{{ s.frequency_label }}</span></td>
+            <td><span class="badge bg-secondary">{{ s.recurrence_label }}</span></td>
             <td>
               {{ s.next_due_date.strftime('%b %d, %Y') }}
               {% if overdue %}
@@ -62,11 +62,19 @@
             <td class="text-end text-nowrap">
               {# Start is shown only to the assignee — the inspection is theirs to do. #}
               {% if s.active and s.inspector_id and s.inspector_id == current_user.id %}
+              {% set open_id = open_inspections.get(s.id) %}
+              {% if open_id %}
+              <a href="{{ url_for('inspections.execute', inspection_id=open_id) }}"
+                 class="btn btn-sm btn-warning" title="You already started this — resume it">
+                <i class="bi bi-pencil-square"></i> Continue
+              </a>
+              {% else %}
               <a href="{{ url_for('scheduled_inspections.start', schedule_id=s.id) }}"
                  class="btn btn-sm btn-success" title="Start this inspection">
                 <i class="bi bi-play-fill"></i> Start
               </a>
               {% endif %}
+              {% endif %}
               {% if current_user.role in ['admin','director','project_manager','auditor'] %}
               <a href="{{ url_for('scheduled_inspections.edit', schedule_id=s.id) }}"
                  class="btn btn-sm btn-outline-primary"><i class="bi bi-pencil"></i></a>
diff --git a/app/utils/forms.py b/app/utils/forms.py
index f2da4e1..37c412b 100644
--- a/app/utils/forms.py
+++ b/app/utils/forms.py
@@ -2,7 +2,7 @@ from flask_wtf import FlaskForm
 from flask_wtf.file import FileField, FileAllowed, MultipleFileField
 from wtforms import (StringField, PasswordField, SelectField, TextAreaField,
                      DecimalField, BooleanField, IntegerField, HiddenField,
-                     RadioField, DateField)
+                     RadioField, DateField, SelectMultipleField)
 from wtforms.validators import (DataRequired, Email, Length, EqualTo,
                                 Optional, NumberRange, ValidationError)
 from app.models.user import User
@@ -338,10 +338,54 @@ class ScheduledInspectionForm(FlaskForm):
         ('once', 'One-time'), ('daily', 'Daily'),
         ('weekly', 'Weekly'), ('monthly', 'Monthly'),
     ], validators=[DataRequired()])
-    next_due_date = DateField('Due Date', validators=[DataRequired()])
+    next_due_date = DateField('Start / Due Date', validators=[DataRequired()])
     notes         = TextAreaField('Notes', validators=[Optional(), Length(max=1000)])
     active        = BooleanField('Active', default=True)
 
+    # ── Recurrence detail (phase43) ──────────────────────────────────────────
+    # Only the block matching `frequency` is required; the rest is ignored and
+    # cleared on save. Shown/hidden client-side, enforced in validate() below.
+    weekdays = SelectMultipleField(
+        'Days of the Week', coerce=int, validators=[Optional()],
+        choices=[(i, n) for i, n in enumerate(
+            ['Monday', 'Tuesday', 'Wednesday', 'Thursday',
+             'Friday', 'Saturday', 'Sunday'])],
+    )
+    month_mode = SelectField('Monthly Rule', validators=[Optional()], choices=[
+        ('day_of_month', 'On a day of the month'),
+        ('nth_weekday',  'On a weekday of the month'),
+    ], default='day_of_month')
+    day_of_month = IntegerField(
+        'Day of Month', validators=[Optional(), NumberRange(min=1, max=31)])
+    nth_week = SelectField('Week', coerce=int, validators=[Optional()], choices=[
+        (1, '1st'), (2, '2nd'), (3, '3rd'), (4, '4th'), (5, '5th'), (-1, 'Last'),
+    ], default=1)
+    nth_weekday = SelectField(
+        'Weekday', coerce=int, validators=[Optional()],
+        choices=[(i, n) for i, n in enumerate(
+            ['Monday', 'Tuesday', 'Wednesday', 'Thursday',
+             'Friday', 'Saturday', 'Sunday'])],
+        default=0,
+    )
+
+    def validate(self, extra_validators=None):
+        """Conditionally require the recurrence block for the chosen frequency."""
+        if not super().validate(extra_validators):
+            return False
+        ok = True
+        if self.frequency.data == 'weekly' and not self.weekdays.data:
+            self.weekdays.errors.append('Pick at least one day of the week.')
+            ok = False
+        elif self.frequency.data == 'monthly':
+            if self.month_mode.data == 'nth_weekday':
+                if not self.nth_week.data or self.nth_weekday.data is None:
+                    self.nth_week.errors.append('Choose which weekday of the month.')
+                    ok = False
+            elif not self.day_of_month.data:
+                self.day_of_month.errors.append('Enter a day of the month (1–31).')
+                ok = False
+        return ok
+
 
 # ── Support Knowledge Base (phase38) ─────────────────────────────────────────
 
diff --git a/migrations/versions/phase43_scheduled_recurrence.py b/migrations/versions/phase43_scheduled_recurrence.py
new file mode 100644
index 0000000..58896ac
--- /dev/null
+++ b/migrations/versions/phase43_scheduled_recurrence.py
@@ -0,0 +1,66 @@
+"""phase43 — scheduled inspection day-of-week / day-of-month recurrence
+
+Adds the recurrence-detail columns to `scheduled_inspections` so a weekly
+schedule can name the weekdays it runs on (Mon/Wed/Fri) and a monthly schedule
+can name either a day of the month ("the 15th") or an nth weekday ("the 2nd
+Tuesday"):
+
+    weekdays     VARCHAR(20)  -- CSV of Python weekday ints, Mon=0, e.g. '0,2,4'
+    month_mode   VARCHAR(20)  -- 'day_of_month' | 'nth_weekday'
+    day_of_month SMALLINT     -- 1–31, clamped to the month's last day
+    nth_week     SMALLINT     -- 1–5, or -1 for "last"
+    nth_weekday  SMALLINT     -- 0–6, Mon=0
+
+All nullable with no backfill: existing phase36 rows keep NULLs and fall back to
+the legacy "+7 days" / "same day next month" behaviour in
+ScheduledInspection._add_interval(), so no schedule changes cadence on deploy.
+
+`month_mode` is VARCHAR rather than ENUM so adding a recurrence style later
+needs no 3-step MySQL ENUM migration (CLAUDE.md rule 3).
+
+Uses INFORMATION_SCHEMA column-existence checks — safe to re-run.
+"""
+
+revision      = 'phase43_sched_recurrence'
+down_revision = 'phase42_internal_contact'
+branch_labels = None
+depends_on    = None
+
+from alembic import op
+import sqlalchemy as sa
+
+
+_COLUMNS = (
+    ('weekdays',     'VARCHAR(20) NULL'),
+    ('month_mode',   'VARCHAR(20) NULL'),
+    ('day_of_month', 'SMALLINT NULL'),
+    ('nth_week',     'SMALLINT NULL'),
+    ('nth_weekday',  'SMALLINT NULL'),
+)
+
+
+def _column_exists(conn, table, column):
+    result = conn.execute(sa.text(
+        "SELECT COUNT(*) FROM INFORMATION_SCHEMA.COLUMNS "
+        "WHERE TABLE_SCHEMA = DATABASE() "
+        "AND TABLE_NAME = :t AND COLUMN_NAME = :c"
+    ), {"t": table, "c": column})
+    return result.scalar() > 0
+
+
+def upgrade():
+    bind = op.get_bind()
+    for name, ddl in _COLUMNS:
+        if not _column_exists(bind, 'scheduled_inspections', name):
+            op.execute(sa.text(
+                f"ALTER TABLE scheduled_inspections ADD COLUMN {name} {ddl}"
+            ))
+
+
+def downgrade():
+    bind = op.get_bind()
+    for name, _ in reversed(_COLUMNS):
+        if _column_exists(bind, 'scheduled_inspections', name):
+            op.execute(sa.text(
+                f"ALTER TABLE scheduled_inspections DROP COLUMN {name}"
+            ))