diff --git a/frontend/src/lib/i18n/en.json b/frontend/src/lib/i18n/en.json
index b03942b..d88c9c1 100644
--- a/frontend/src/lib/i18n/en.json
+++ b/frontend/src/lib/i18n/en.json
@@ -523,6 +523,9 @@
 		"memorySource": "Memory source",
 		"memorySourceAlbums": "Scan tracked albums",
 		"memorySourceNative": "Immich native memories",
+		"quietHours": "Quiet hours",
+		"quietHoursStart": "Start",
+		"quietHoursEnd": "End",
 		"test": "Test",
 		"confirmDelete": "Delete this tracking config?",
 		"sortNone": "None",
@@ -670,6 +673,8 @@
 		"webhookSecretHint": "Secret token to verify webhook requests from Telegram",
 		"cacheTtl": "Media Cache TTL (hours)",
 		"cacheTtlHint": "How long to cache uploaded Telegram file_ids before re-uploading",
+		"timezone": "Timezone",
+		"timezoneHint": "IANA timezone (e.g. UTC, Europe/Warsaw, America/New_York). Used to interpret HH:MM fields like quiet hours.",
 		"locales": "Template Languages",
 		"supportedLocales": "Supported Locales",
 		"supportedLocalesHint": "Comma-separated locale codes for template editing (e.g. en,ru,de,fr)",
@@ -680,6 +685,7 @@
 		"scheduledAssets": "Sends random or selected photos from tracked albums on a schedule. Like a daily photo pick.",
 		"memoryMode": "\"On This Day\" — sends photos taken on this date in previous years. Nostalgic flashbacks.",
 		"memorySource": "Albums: scans tracked albums for date-matching assets. Native: uses Immich's built-in memories (covers entire library, optionally filtered by tracked albums).",
+		"quietHours": "Suppress all notifications during this HH:MM window (interpreted in the app timezone). Overnight windows like 22:00–07:00 are supported.",
 		"favoritesOnly": "Only include assets marked as favorites.",
 		"maxAssets": "Maximum number of asset details to include in a single notification message.",
 		"periodicStartDate": "The reference date for calculating periodic intervals. Summaries are sent every N days from this date.",
diff --git a/frontend/src/lib/i18n/ru.json b/frontend/src/lib/i18n/ru.json
index 4e1120e..8ecdaf6 100644
--- a/frontend/src/lib/i18n/ru.json
+++ b/frontend/src/lib/i18n/ru.json
@@ -523,6 +523,9 @@
 		"memorySource": "Источник воспоминаний",
 		"memorySourceAlbums": "Сканировать альбомы",
 		"memorySourceNative": "Встроенные воспоминания Immich",
+		"quietHours": "Тихие часы",
+		"quietHoursStart": "Начало",
+		"quietHoursEnd": "Конец",
 		"test": "Тест",
 		"confirmDelete": "Удалить эту конфигурацию отслеживания?",
 		"sortNone": "Нет",
@@ -670,6 +673,8 @@
 		"webhookSecretHint": "Секретный токен для проверки запросов вебхука от Telegram",
 		"cacheTtl": "TTL кэша медиа (часы)",
 		"cacheTtlHint": "Сколько хранить кэш Telegram file_id перед повторной загрузкой",
+		"timezone": "Часовой пояс",
+		"timezoneHint": "Часовой пояс IANA (например UTC, Europe/Warsaw, America/New_York). Используется для интерпретации полей HH:MM, таких как тихие часы.",
 		"locales": "Языки шаблонов",
 		"supportedLocales": "Поддерживаемые локали",
 		"supportedLocalesHint": "Коды локалей через запятую для редактирования шаблонов (например en,ru,de,fr)",
@@ -680,6 +685,7 @@
 		"scheduledAssets": "Отправляет случайные или выбранные фото из альбомов по расписанию. Как ежедневная подборка фото.",
 		"memoryMode": "\"В этот день\" — отправляет фото, сделанные в этот день в прошлые годы. Ностальгические воспоминания.",
 		"memorySource": "Альбомы: сканирует отслеживаемые альбомы по дате. Встроенные: использует воспоминания Immich (вся библиотека, с фильтрацией по альбомам).",
+		"quietHours": "Подавляет все уведомления в указанном HH:MM окне (по часовому поясу приложения). Поддерживаются окна через полночь, например 22:00–07:00.",
 		"favoritesOnly": "Включать только ассеты, отмеченные как избранные.",
 		"maxAssets": "Максимальное количество ассетов в одном уведомлении.",
 		"periodicStartDate": "Опорная дата для расчёта интервалов. Сводки отправляются каждые N дней от этой даты.",
diff --git a/frontend/src/lib/providers/immich.ts b/frontend/src/lib/providers/immich.ts
index 77532b5..0439f2a 100644
--- a/frontend/src/lib/providers/immich.ts
+++ b/frontend/src/lib/providers/immich.ts
@@ -88,6 +88,14 @@ export const immichDescriptor: ProviderDescriptor = {
 				{ key: 'memory_source', label: 'trackingConfig.memorySource', type: 'grid-select', gridItems: 'memorySourceItems', gridColumns: 2, defaultValue: 'albums' },
 			],
 		},
+		{
+			key: 'quietHours', legend: 'trackingConfig.quietHours', legendHint: 'hints.quietHours',
+			enabledField: 'quiet_hours_enabled', enabledDefault: false,
+			fields: [
+				{ key: 'quiet_hours_start', label: 'trackingConfig.quietHoursStart', type: 'number', defaultValue: '22:00' },
+				{ key: 'quiet_hours_end', label: 'trackingConfig.quietHoursEnd', type: 'number', defaultValue: '07:00' },
+			],
+		},
 	],
 
 	collectionMeta: {
diff --git a/frontend/src/lib/types.ts b/frontend/src/lib/types.ts
index c39817d..b04c314 100644
--- a/frontend/src/lib/types.ts
+++ b/frontend/src/lib/types.ts
@@ -192,6 +192,9 @@ export interface TrackingConfig {
 	memory_favorite_only: boolean;
 	memory_asset_type: string;
 	memory_min_rating: number;
+	quiet_hours_enabled: boolean;
+	quiet_hours_start: string | null;
+	quiet_hours_end: string | null;
 	created_at: string;
 }
 
diff --git a/frontend/src/routes/settings/+page.svelte b/frontend/src/routes/settings/+page.svelte
index 50dee25..7908e9b 100644
--- a/frontend/src/routes/settings/+page.svelte
+++ b/frontend/src/routes/settings/+page.svelte
@@ -19,6 +19,7 @@
 		telegram_webhook_secret: '',
 		telegram_cache_ttl_hours: '48',
 		supported_locales: 'en,ru',
+		timezone: 'UTC',
 	});
 
 	onMount(async () => {
@@ -57,6 +58,11 @@
 					<input bind:value={settings.external_url} placeholder="https://notify.example.com"
 						class="w-full max-w-md px-3 py-1.5 text-sm border border-[var(--color-border)] rounded-md bg-[var(--color-background)] font-mono" />
 				</div>
+				<div>
+					<label class="block text-xs font-medium mb-1">{t('settings.timezone')}<Hint text={t('settings.timezoneHint')} /></label>
+					<input bind:value={settings.timezone} placeholder="UTC"
+						class="w-full max-w-md px-3 py-1.5 text-sm border border-[var(--color-border)] rounded-md bg-[var(--color-background)] font-mono" />
+				</div>
 			</div>
 		</Card>
 
diff --git a/frontend/src/routes/tracking-configs/+page.svelte b/frontend/src/routes/tracking-configs/+page.svelte
index e7be25c..d4d9496 100644
--- a/frontend/src/routes/tracking-configs/+page.svelte
+++ b/frontend/src/routes/tracking-configs/+page.svelte
@@ -181,9 +181,12 @@
 						{:else if field.type === 'grid-select' && field.gridItems}
 							<IconGridSelect items={gridItemSources[field.gridItems]()} bind:value={form[field.key]} columns={field.gridColumns ?? 2} compact />
 						{:else}
-							<input type={field.key.includes('date') ? 'date' : field.key.includes('times') ? 'text' : 'number'}
+							<input type={field.key.includes('date') ? 'date'
+									: field.key.startsWith('quiet_hours_') ? 'time'
+									: field.key.includes('times') ? 'text'
+									: 'number'}
 								bind:value={form[field.key]} min={field.min} max={field.max}
-								placeholder={field.key.includes('times') ? String(field.defaultValue ?? '') : ''}
+								placeholder={field.key.includes('times') || field.key.startsWith('quiet_hours_') ? String(field.defaultValue ?? '') : ''}
 								class="w-full px-2 py-1 border border-[var(--color-border)] rounded-md text-sm bg-[var(--color-background)]" />
 						{/if}
 					</div>
diff --git a/packages/server/src/notify_bridge_server/api/app_settings.py b/packages/server/src/notify_bridge_server/api/app_settings.py
index ce5cc9f..54704c9 100644
--- a/packages/server/src/notify_bridge_server/api/app_settings.py
+++ b/packages/server/src/notify_bridge_server/api/app_settings.py
@@ -22,6 +22,7 @@ _SETTING_KEYS = {
     "telegram_webhook_secret": "NOTIFY_BRIDGE_TELEGRAM_WEBHOOK_SECRET",
     "telegram_cache_ttl_hours": None,  # no env fallback, default 48
     "supported_locales": None,  # comma-separated locale codes
+    "timezone": "NOTIFY_BRIDGE_TIMEZONE",  # IANA tz (e.g. "Europe/Warsaw"); empty = UTC
 }
 
 _DEFAULTS = {
@@ -29,6 +30,7 @@ _DEFAULTS = {
     "telegram_webhook_secret": "",
     "telegram_cache_ttl_hours": "48",
     "supported_locales": "en,ru",
+    "timezone": "UTC",
 }
 
 
@@ -50,6 +52,7 @@ class SettingsUpdate(BaseModel):
     telegram_webhook_secret: str | None = None
     telegram_cache_ttl_hours: str | None = None
     supported_locales: str | None = None
+    timezone: str | None = None
 
 
 @router.get("")
diff --git a/packages/server/src/notify_bridge_server/api/tracking_configs.py b/packages/server/src/notify_bridge_server/api/tracking_configs.py
index e82aad4..88098a3 100644
--- a/packages/server/src/notify_bridge_server/api/tracking_configs.py
+++ b/packages/server/src/notify_bridge_server/api/tracking_configs.py
@@ -54,6 +54,9 @@ class TrackingConfigCreate(BaseModel):
     memory_favorite_only: bool = False
     memory_asset_type: str = "all"
     memory_min_rating: int = 0
+    quiet_hours_enabled: bool = False
+    quiet_hours_start: str | None = None
+    quiet_hours_end: str | None = None
 
 
 class TrackingConfigUpdate(BaseModel):
@@ -93,6 +96,9 @@ class TrackingConfigUpdate(BaseModel):
     memory_favorite_only: bool | None = None
     memory_asset_type: str | None = None
     memory_min_rating: int | None = None
+    quiet_hours_enabled: bool | None = None
+    quiet_hours_start: str | None = None
+    quiet_hours_end: str | None = None
 
 
 @router.get("")
diff --git a/packages/server/src/notify_bridge_server/api/webhooks.py b/packages/server/src/notify_bridge_server/api/webhooks.py
index 8acff74..1bdab14 100644
--- a/packages/server/src/notify_bridge_server/api/webhooks.py
+++ b/packages/server/src/notify_bridge_server/api/webhooks.py
@@ -27,7 +27,11 @@ from ..database.models import (
     ServiceProvider,
     WebhookPayloadLog,
 )
-from ..services.dispatch_helpers import event_allowed_by_config, load_link_data
+from ..services.dispatch_helpers import (
+    event_allowed_by_config,
+    get_app_timezone,
+    load_link_data,
+)
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -144,6 +148,8 @@ async def _dispatch_webhook_event(
             if not link_data:
                 continue
 
+            app_tz = await get_app_timezone(session)
+
             # Log event
             extra_details = {k: v for k, v in event.extra.items() if k in detail_keys}
             session.add(EventLog(
@@ -164,7 +170,7 @@ async def _dispatch_webhook_event(
 
             # Dispatch to targets
             dispatcher = NotificationDispatcher()
-            target_configs = _build_target_configs(event, link_data, provider_config)
+            target_configs = _build_target_configs(event, link_data, provider_config, app_tz)
             if target_configs:
                 results = await dispatcher.dispatch(event, target_configs)
                 for r in results:
@@ -513,12 +519,13 @@ def _build_target_configs(
     event: ServiceEvent,
     link_data: list[dict[str, Any]],
     provider_config: dict[str, Any],
+    app_tz: str = "UTC",
 ) -> list[TargetConfig]:
     """Build TargetConfig objects for dispatch, applying tracking config filters."""
     target_configs: list[TargetConfig] = []
     for ld in link_data:
         tc = ld["tracking_config"]
-        if tc and not event_allowed_by_config(event, tc):
+        if tc and not event_allowed_by_config(event, tc, app_tz):
             continue
 
         tmpl = ld["template_config"]
diff --git a/packages/server/src/notify_bridge_server/database/models.py b/packages/server/src/notify_bridge_server/database/models.py
index 26eff69..cac9ad4 100644
--- a/packages/server/src/notify_bridge_server/database/models.py
+++ b/packages/server/src/notify_bridge_server/database/models.py
@@ -204,6 +204,13 @@ class TrackingConfig(SQLModel, table=True):
     memory_asset_type: str = Field(default="all")
     memory_min_rating: int = Field(default=0)
 
+    # Quiet hours — HH:MM strings interpreted in the app-level timezone
+    # (AppSetting "timezone"). Gated by quiet_hours_enabled so an empty window
+    # still represents "explicitly disabled" vs "not yet configured".
+    quiet_hours_enabled: bool = Field(default=False)
+    quiet_hours_start: str | None = Field(default=None)
+    quiet_hours_end: str | None = Field(default=None)
+
     created_at: datetime = Field(default_factory=_utcnow)
 
 
diff --git a/packages/server/src/notify_bridge_server/services/dispatch_helpers.py b/packages/server/src/notify_bridge_server/services/dispatch_helpers.py
index 06ee98d..482e11b 100644
--- a/packages/server/src/notify_bridge_server/services/dispatch_helpers.py
+++ b/packages/server/src/notify_bridge_server/services/dispatch_helpers.py
@@ -5,6 +5,7 @@ from __future__ import annotations
 import logging
 from datetime import datetime, time, timezone
 from typing import Any
+from zoneinfo import ZoneInfo, ZoneInfoNotFoundError
 
 from sqlmodel import select
 from sqlmodel.ext.asyncio.session import AsyncSession
@@ -29,12 +30,32 @@ from ..database.models import (
 _LOGGER = logging.getLogger(__name__)
 
 
-def in_quiet_hours(start: str | None, end: str | None) -> bool:
-    """Check if the current UTC time is within the quiet hours window."""
+def _resolve_zoneinfo(tz_name: str | None) -> ZoneInfo:
+    """Resolve an IANA tz string to a ZoneInfo, falling back to UTC on any error."""
+    if not tz_name:
+        return ZoneInfo("UTC")
+    try:
+        return ZoneInfo(tz_name)
+    except (ZoneInfoNotFoundError, ValueError):
+        _LOGGER.warning("Unknown timezone %r; falling back to UTC", tz_name)
+        return ZoneInfo("UTC")
+
+
+def in_quiet_hours(
+    start: str | None,
+    end: str | None,
+    tz_name: str | None = "UTC",
+) -> bool:
+    """Check if the current time (in the given timezone) is within the quiet window.
+
+    HH:MM strings are interpreted in the supplied timezone. If either bound is
+    missing, quiet hours are disabled.
+    """
     if not start or not end:
         return False
     try:
-        now = datetime.now(timezone.utc).time()
+        tz = _resolve_zoneinfo(tz_name)
+        now = datetime.now(timezone.utc).astimezone(tz).time()
         t_start = time.fromisoformat(start)
         t_end = time.fromisoformat(end)
         if t_start <= t_end:
@@ -46,8 +67,25 @@ def in_quiet_hours(start: str | None, end: str | None) -> bool:
         return False
 
 
-def event_allowed_by_config(event: ServiceEvent, tc: TrackingConfig) -> bool:
-    """Check if an event type is allowed by the tracking config's flags."""
+async def get_app_timezone(session: AsyncSession) -> str:
+    """Load the app-level timezone from AppSetting (falls back to UTC)."""
+    from ..api.app_settings import get_setting
+    value = await get_setting(session, "timezone")
+    return value or "UTC"
+
+
+def event_allowed_by_config(
+    event: ServiceEvent,
+    tc: TrackingConfig,
+    tz_name: str | None = "UTC",
+) -> bool:
+    """Check if an event is allowed by the tracking config's flags + quiet hours."""
+    # Quiet hours gate every event type when enabled.
+    if tc.quiet_hours_enabled and in_quiet_hours(
+        tc.quiet_hours_start, tc.quiet_hours_end, tz_name
+    ):
+        return False
+
     event_type = event.event_type.value
     flag_map = {
         # Immich events
diff --git a/packages/server/src/notify_bridge_server/services/watcher.py b/packages/server/src/notify_bridge_server/services/watcher.py
index eb6b499..c004910 100644
--- a/packages/server/src/notify_bridge_server/services/watcher.py
+++ b/packages/server/src/notify_bridge_server/services/watcher.py
@@ -21,7 +21,11 @@ from ..database.models import (
     NotificationTrackerState,
     ServiceProvider,
 )
-from .dispatch_helpers import event_allowed_by_config, load_link_data
+from .dispatch_helpers import (
+    event_allowed_by_config,
+    get_app_timezone,
+    load_link_data,
+)
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -85,7 +89,10 @@ async def check_tracker(tracker_id: int) -> dict[str, Any]:
             }
 
         # Load tracker-target links
-        link_data = await load_link_data(session, tracker_id, check_quiet_hours=True)
+        link_data = await load_link_data(session, tracker_id)
+
+        # Load app-level timezone for quiet-hours evaluation.
+        app_tz = await get_app_timezone(session)
 
         # Snapshot the data we need
         provider_type = provider.type
@@ -236,7 +243,7 @@ async def check_tracker(tracker_id: int) -> dict[str, Any]:
             for ld in link_data:
                 # Apply per-link event filtering from tracking config
                 tc = ld["tracking_config"]
-                if tc and not event_allowed_by_config(event, tc):
+                if tc and not event_allowed_by_config(event, tc, app_tz):
                     _LOGGER.info("  Skipped by tracking config filter")
                     continue