diff --git a/.github/workflows/sync-cloud-run-env.yml b/.github/workflows/sync-cloud-run-env.yml
index 98d20cc..fa9c6d6 100644
--- a/.github/workflows/sync-cloud-run-env.yml
+++ b/.github/workflows/sync-cloud-run-env.yml
@@ -73,6 +73,7 @@ jobs:
       CLOUD_RUN_SERVICES: ${{ vars.CLOUD_RUN_SERVICES }}
       CLOUD_RUN_SERVICE_TARGETS_JSON: ${{ vars.CLOUD_RUN_SERVICE_TARGETS_JSON }}
       CLOUD_RUN_ENV_SYNC_WAIT_FOR_COMMIT: ${{ vars.CLOUD_RUN_ENV_SYNC_WAIT_FOR_COMMIT }}
+      CLOUD_SCHEDULER_LOCATION: ${{ vars.CLOUD_SCHEDULER_LOCATION }}
       TELEGRAM_TOKEN_SECRET_NAME: ${{ vars.TELEGRAM_TOKEN_SECRET_NAME }}
       RUNTIME_TARGET_JSON: ${{ vars.RUNTIME_TARGET_JSON }}
       ACCOUNT_GROUP: ${{ vars.ACCOUNT_GROUP }}
@@ -852,6 +853,59 @@ jobs:
             gcloud "${gcloud_args[@]}"
           done
 
+      - name: Sync Cloud Scheduler timezone
+        if: steps.config.outputs.env_sync_enabled == 'true'
+        env:
+          SYNC_PLAN_JSON: ${{ steps.strategy_requirements.outputs.sync_plan_json }}
+        run: |
+          set -euo pipefail
+
+          scheduler_location="${CLOUD_SCHEDULER_LOCATION:-${CLOUD_RUN_REGION}}"
+          if [ -z "${scheduler_location}" ]; then
+            echo "Cloud Scheduler timezone sync requires CLOUD_RUN_REGION or CLOUD_SCHEDULER_LOCATION." >&2
+            exit 1
+          fi
+
+          mapfile -t scheduler_updates < <(python - <<'PY'
+          import json
+          import os
+
+          plan = json.loads(os.environ["SYNC_PLAN_JSON"])
+          for target in plan["targets"]:
+              service_name = str(target["service_name"]).strip()
+              env = target.get("env") or {}
+              timezone = str(env.get("IBKR_MARKET_TIMEZONE") or "").strip()
+              market = str(env.get("IBKR_MARKET") or "").strip().upper()
+              if not timezone:
+                  timezone = "Asia/Hong_Kong" if market == "HK" else "America/New_York"
+              print(f"{service_name}\t{timezone}")
+          PY
+          )
+
+          for update in "${scheduler_updates[@]}"; do
+            IFS=$'\t' read -r cloud_run_service market_timezone <<< "${update}"
+            if [ -z "${cloud_run_service}" ] || [ -z "${market_timezone}" ]; then
+              continue
+            fi
+
+            for suffix in scheduler probe-scheduler precheck-scheduler; do
+              job_name="${cloud_run_service}-${suffix}"
+              if ! gcloud scheduler jobs describe "${job_name}" \
+                --project="${GCP_PROJECT_ID}" \
+                --location="${scheduler_location}" >/dev/null 2>&1; then
+                echo "Cloud Scheduler job ${job_name} was not found in ${scheduler_location}; skipping timezone sync."
+                continue
+              fi
+
+              echo "Updating Cloud Scheduler job ${job_name} timezone to ${market_timezone}."
+              gcloud scheduler jobs update http "${job_name}" \
+                --project="${GCP_PROJECT_ID}" \
+                --location="${scheduler_location}" \
+                --time-zone="${market_timezone}" \
+                --quiet
+            done
+          done
+
       - name: Prune old Cloud Run revisions
         if: steps.config.outputs.enabled == 'true'
         env:
diff --git a/scripts/execution_report_heartbeat.py b/scripts/execution_report_heartbeat.py
index 066166c..f01c8b5 100644
--- a/scripts/execution_report_heartbeat.py
+++ b/scripts/execution_report_heartbeat.py
@@ -137,15 +137,29 @@ def _load_required_services(
     since: dt.datetime | None = None,
     now: dt.datetime | None = None,
 ) -> list[str]:
+    services, _skip_reason, _scheduler_checked = _resolve_required_services(
+        project=project,
+        since=since,
+        now=now,
+    )
+    return services
+
+
+def _resolve_required_services(
+    *,
+    project: str | None = None,
+    since: dt.datetime | None = None,
+    now: dt.datetime | None = None,
+) -> tuple[list[str], str | None, bool]:
     services, explicit = _load_required_service_candidates()
     if explicit or not services:
-        return services
+        return services, None, False
     if not _env_bool("RUNTIME_HEARTBEAT_SCHEDULER_AWARE", True):
-        return services
+        return services, None, False
     if since is None or now is None:
-        return services
+        return services, None, False
     try:
-        return _filter_scheduler_due_services(
+        due_services = _filter_scheduler_due_services(
             services,
             project=project,
             since=since,
@@ -157,7 +171,14 @@ def _load_required_services(
             "falling back to all configured services.",
             file=sys.stderr,
         )
-        return services
+        return services, None, False
+    if not due_services:
+        return (
+            [],
+            "no configured Cloud Scheduler main job was due in the heartbeat lookback window",
+            True,
+        )
+    return due_services, None, True
 
 
 def _unique_values(values: list[str]) -> list[str]:
@@ -522,7 +543,7 @@ def _send_telegram(message: str) -> bool:
     return ok
 
 
-def main() -> int:
+def main(now: dt.datetime | None = None) -> int:
     project = (
         os.environ.get("RUNTIME_HEARTBEAT_GCP_PROJECT_ID")
         or os.environ.get("GCP_PROJECT_ID")
@@ -533,9 +554,19 @@ def main() -> int:
     max_reports = int(os.environ.get("RUNTIME_HEARTBEAT_MAX_REPORTS_TO_READ") or "20")
     fail_workflow = _env_bool("RUNTIME_HEARTBEAT_FAIL_WORKFLOW_ON_ALERT", True)
 
-    now = dt.datetime.now(dt.timezone.utc)
+    now = now or dt.datetime.now(dt.timezone.utc)
+    if now.tzinfo is None:
+        now = now.replace(tzinfo=dt.timezone.utc)
+    now = now.astimezone(dt.timezone.utc)
     since = now - dt.timedelta(hours=lookback_hours)
-    required_services = _load_required_services(project=project, since=since, now=now)
+    required_services, scheduler_skip_reason, _scheduler_checked = _resolve_required_services(
+        project=project,
+        since=since,
+        now=now,
+    )
+    if scheduler_skip_reason:
+        print(f"Execution report heartbeat skipped for {name}: {scheduler_skip_reason}")
+        return 0
     globs = _report_globs(since, now)
     if not globs:
         raise SystemExit("No heartbeat GCS report URI configured")
diff --git a/tests/test_execution_report_heartbeat.py b/tests/test_execution_report_heartbeat.py
index d2ed260..fb4ebe9 100644
--- a/tests/test_execution_report_heartbeat.py
+++ b/tests/test_execution_report_heartbeat.py
@@ -3,6 +3,8 @@
 import datetime as dt
 import json
 
+import pytest
+
 from scripts import execution_report_heartbeat as heartbeat
 
 
@@ -114,3 +116,36 @@ def test_scheduler_aware_required_services_include_monthly_service_when_due(monk
     )
 
     assert required == ["svc-monthly"]
+
+
+def test_main_skips_when_no_scheduler_main_job_is_due(monkeypatch, capsys):
+    monkeypatch.delenv("RUNTIME_HEARTBEAT_REQUIRED_SERVICES", raising=False)
+    monkeypatch.setenv("GCP_PROJECT_ID", "interactivebrokersquant")
+    monkeypatch.setenv("RUNTIME_HEARTBEAT_NAME", "Monthly runtime")
+    monkeypatch.setenv("RUNTIME_HEARTBEAT_REPORT_PLATFORM", "interactive_brokers")
+    monkeypatch.setenv("CLOUD_RUN_SERVICE", "ibkr-monthly-service")
+    monkeypatch.setenv("RUNTIME_HEARTBEAT_GCS_URIS", "gs://bucket/execution-reports")
+    monkeypatch.setattr(
+        heartbeat,
+        "_list_scheduler_jobs",
+        lambda **_kwargs: [
+            {
+                "state": "ENABLED",
+                "schedule": "45 15 26 * *",
+                "timeZone": "America/New_York",
+                "httpTarget": {"uri": "https://ibkr-monthly-service.example.run.app/"},
+            },
+        ],
+    )
+    monkeypatch.setattr(
+        heartbeat,
+        "_list_gcs_objects",
+        lambda *_args, **_kwargs: pytest.fail("GCS should not be queried when no scheduler job is due"),
+    )
+
+    result = heartbeat.main(now=dt.datetime(2026, 6, 10, 1, 35, tzinfo=dt.timezone.utc))
+
+    assert result == 0
+    output = capsys.readouterr().out
+    assert "Execution report heartbeat skipped for Monthly runtime" in output
+    assert "no configured Cloud Scheduler main job was due" in output
diff --git a/tests/test_sync_cloud_run_env_workflow.sh b/tests/test_sync_cloud_run_env_workflow.sh
index 07bfdfa..4b04aa4 100644
--- a/tests/test_sync_cloud_run_env_workflow.sh
+++ b/tests/test_sync_cloud_run_env_workflow.sh
@@ -28,6 +28,7 @@ grep -Fq 'CLOUD_RUN_SERVICE: ${{ vars.CLOUD_RUN_SERVICE }}' "$workflow_file"
 grep -Fq 'CLOUD_RUN_SERVICES: ${{ vars.CLOUD_RUN_SERVICES }}' "$workflow_file"
 grep -Fq 'CLOUD_RUN_SERVICE_TARGETS_JSON: ${{ vars.CLOUD_RUN_SERVICE_TARGETS_JSON }}' "$workflow_file"
 grep -Fq 'CLOUD_RUN_ENV_SYNC_WAIT_FOR_COMMIT: ${{ vars.CLOUD_RUN_ENV_SYNC_WAIT_FOR_COMMIT }}' "$workflow_file"
+grep -Fq 'CLOUD_SCHEDULER_LOCATION: ${{ vars.CLOUD_SCHEDULER_LOCATION }}' "$workflow_file"
 grep -Fq 'RUNTIME_TARGET_JSON: ${{ vars.RUNTIME_TARGET_JSON }}' "$workflow_file"
 grep -Fq 'ACCOUNT_GROUP: ${{ vars.ACCOUNT_GROUP }}' "$workflow_file"
 grep -Fq 'IB_ACCOUNT_GROUP_CONFIG_SECRET_NAME: ${{ vars.IB_ACCOUNT_GROUP_CONFIG_SECRET_NAME }}' "$workflow_file"
@@ -82,6 +83,15 @@ grep -Fq -- '--concurrency 1' "$workflow_file"
 grep -Fq -- '--max-instances 1' "$workflow_file"
 grep -Fq -- '--remove-env-vars "$(IFS=,; echo "${remove_env_vars[*]}")' "$workflow_file"
 grep -Fq -- '--update-env-vars "^|^$(join_by_delimiter "|" "${env_pairs[@]}")' "$workflow_file"
+grep -Fq 'Sync Cloud Scheduler timezone' "$workflow_file"
+grep -Fq 'scheduler_location="${CLOUD_SCHEDULER_LOCATION:-${CLOUD_RUN_REGION}}"' "$workflow_file"
+grep -Fq 'timezone = str(env.get("IBKR_MARKET_TIMEZONE") or "").strip()' "$workflow_file"
+grep -Fq 'timezone = "Asia/Hong_Kong" if market == "HK" else "America/New_York"' "$workflow_file"
+grep -Fq 'print(f"{service_name}\t{timezone}")' "$workflow_file"
+grep -Fq 'for suffix in scheduler probe-scheduler precheck-scheduler; do' "$workflow_file"
+grep -Fq 'gcloud scheduler jobs describe "${job_name}"' "$workflow_file"
+grep -Fq 'gcloud scheduler jobs update http "${job_name}"' "$workflow_file"
+grep -Fq -- '--time-zone="${market_timezone}"' "$workflow_file"
 
 grep -Fq '"CRISIS_ALERT_GOOGLE_VOICE_TO"' "$workflow_file"
 grep -Fq '"CRISIS_ALERT_GOOGLE_VOICE_SENDER_PASSWORD"' "$workflow_file"