diff --git a/supabase/nightly_sprint_rollover.sql b/supabase/nightly_sprint_rollover.sql
new file mode 100644
index 0000000..b1503a7
--- /dev/null
+++ b/supabase/nightly_sprint_rollover.sql
@@ -0,0 +1,69 @@
+-- Nightly sprint auto-close + rollover job
+-- Schedule: 12:01 AM UTC every day
+
+CREATE EXTENSION IF NOT EXISTS pg_cron;
+
+CREATE OR REPLACE FUNCTION public.complete_ended_sprints_and_rollover()
+RETURNS void
+LANGUAGE plpgsql
+SECURITY DEFINER
+SET search_path = public
+AS $$
+DECLARE
+  ended_sprint RECORD;
+  next_sprint_id UUID;
+BEGIN
+  FOR ended_sprint IN
+    SELECT id, project_id
+    FROM public.sprints
+    WHERE status <> 'completed'
+      AND end_date < CURRENT_DATE
+    ORDER BY end_date ASC, start_date ASC
+  LOOP
+    -- Pick the next non-completed sprint in the same project.
+    SELECT s.id
+      INTO next_sprint_id
+    FROM public.sprints s
+    WHERE s.project_id = ended_sprint.project_id
+      AND s.status <> 'completed'
+      AND s.id <> ended_sprint.id
+    ORDER BY s.start_date ASC
+    LIMIT 1;
+
+    IF next_sprint_id IS NOT NULL THEN
+      UPDATE public.tasks
+      SET sprint_id = next_sprint_id
+      WHERE sprint_id = ended_sprint.id
+        AND status NOT IN ('done', 'canceled', 'archived');
+    END IF;
+
+    UPDATE public.sprints
+    SET status = 'completed'
+    WHERE id = ended_sprint.id;
+  END LOOP;
+END;
+$$;
+
+DO $$
+DECLARE
+  existing_job_id BIGINT;
+BEGIN
+  -- Keep this idempotent: replace existing job if present.
+  SELECT jobid
+    INTO existing_job_id
+  FROM cron.job
+  WHERE jobname = 'nightly-sprint-rollover-0001'
+  LIMIT 1;
+
+  IF existing_job_id IS NOT NULL THEN
+    PERFORM cron.unschedule(existing_job_id);
+  END IF;
+
+  PERFORM cron.schedule(
+    'nightly-sprint-rollover-0001',
+    '1 0 * * *',
+    'select public.complete_ended_sprints_and_rollover();'
+  );
+END;
+$$;
+
diff --git a/supabase/schema.sql b/supabase/schema.sql
index f540376..4dbb96b 100644
--- a/supabase/schema.sql
+++ b/supabase/schema.sql
@@ -241,3 +241,75 @@ BEGIN
   DELETE FROM password_reset_tokens WHERE expires_at <= NOW() OR used = true;
 END;
 $$ LANGUAGE plpgsql;
+
+-- ============================================
+-- NIGHTLY SPRINT AUTO-CLOSE + ROLLOVER
+-- ============================================
+-- Runs every night at 12:01 AM UTC.
+-- If you need local time, convert your desired local time to UTC in the cron expression.
+
+CREATE EXTENSION IF NOT EXISTS pg_cron;
+
+CREATE OR REPLACE FUNCTION public.complete_ended_sprints_and_rollover()
+RETURNS void
+LANGUAGE plpgsql
+SECURITY DEFINER
+SET search_path = public
+AS $$
+DECLARE
+  ended_sprint RECORD;
+  next_sprint_id UUID;
+BEGIN
+  FOR ended_sprint IN
+    SELECT id, project_id
+    FROM public.sprints
+    WHERE status <> 'completed'
+      AND end_date < CURRENT_DATE
+    ORDER BY end_date ASC, start_date ASC
+  LOOP
+    -- Pick the next non-completed sprint in the same project.
+    SELECT s.id
+      INTO next_sprint_id
+    FROM public.sprints s
+    WHERE s.project_id = ended_sprint.project_id
+      AND s.status <> 'completed'
+      AND s.id <> ended_sprint.id
+    ORDER BY s.start_date ASC
+    LIMIT 1;
+
+    IF next_sprint_id IS NOT NULL THEN
+      UPDATE public.tasks
+      SET sprint_id = next_sprint_id
+      WHERE sprint_id = ended_sprint.id
+        AND status NOT IN ('done', 'canceled', 'archived');
+    END IF;
+
+    UPDATE public.sprints
+    SET status = 'completed'
+    WHERE id = ended_sprint.id;
+  END LOOP;
+END;
+$$;
+
+DO $$
+DECLARE
+  existing_job_id BIGINT;
+BEGIN
+  -- Keep this idempotent: replace existing job if present.
+  SELECT jobid
+    INTO existing_job_id
+  FROM cron.job
+  WHERE jobname = 'nightly-sprint-rollover-0001'
+  LIMIT 1;
+
+  IF existing_job_id IS NOT NULL THEN
+    PERFORM cron.unschedule(existing_job_id);
+  END IF;
+
+  PERFORM cron.schedule(
+    'nightly-sprint-rollover-0001',
+    '1 0 * * *',
+    'select public.complete_ended_sprints_and_rollover();'
+  );
+END;
+$$;