Fix Tile timestamps shifted by the local UTC offset (#183639)

homeassistant/components/tile/device_tracker.py

@@ -6,7 +6,7 @@ from typing import override
 from homeassistant.components.device_tracker import TrackerEntity
 from homeassistant.core import HomeAssistant, callback
 from homeassistant.helpers.entity_platform import AddConfigEntryEntitiesCallback
-from homeassistant.util.dt import as_utc
+from homeassistant.util import dt as dt_util
 
 from .coordinator import TileConfigEntry, TileCoordinator
 from .entity import TileEntity
@@ -81,9 +81,10 @@ class TileDeviceTracker(TileEntity, TrackerEntity):
                 # If the API doesn't return a value for a particular timestamp
                 # attribute, skip it:
                 continue
-            self._attr_extra_state_attributes[timestamp_attr[0]] = as_utc(
-                timestamp_attr[1]
-            )
+            # pytile returns naive datetimes that hold UTC, not local time:
+            self._attr_extra_state_attributes[timestamp_attr[0]] = timestamp_attr[
+                1
+            ].replace(tzinfo=dt_util.UTC)
 
     @override
     async def async_added_to_hass(self) -> None:

tests/components/tile/snapshots/test_device_tracker.ambr

@@ -47,8 +47,8 @@
       <DeviceTrackerEntityStateAttribute.IN_ZONES: 'in_zones'>: list([
       ]),
       'is_lost': False,
-      'last_lost_timestamp': datetime.datetime(1970, 1, 1, 3, 0, tzinfo=datetime.timezone.utc),
-      'last_timestamp': datetime.datetime(2020, 8, 13, 0, 55, 26, tzinfo=datetime.timezone.utc),
+      'last_lost_timestamp': datetime.datetime(1969, 12, 31, 19, 0, tzinfo=datetime.timezone.utc),
+      'last_timestamp': datetime.datetime(2020, 8, 12, 17, 55, 26, tzinfo=datetime.timezone.utc),
       <EntityStateAttribute.LATITUDE: 'latitude'>: 1,
       <EntityStateAttribute.LONGITUDE: 'longitude'>: 1,
       'ring_state': 'STOPPED',