Tile integration last_timestamp attribute offset error

[emelarnz]

The problem

The last_timestamp attribute on the device tracker appears to be being interpreted as already local rather than as UTC. My timezone is +1200, and the last_timestamp attribute is 12 hours behind what it should be.

For example, this evening NZ time at around 2024-04-27 05:43 UTC, in developer tools, for several of my Tiles, we have:
last_timestamp: "2024-04-26T17:40:24.824000+00:00"
Note that the date is April 26, which is 12 hours behind the current time.

In the entity dialog attributes list we have:
Last timestamp April 27, 2024 at 5:40:24 AM
This appears to be trying to show as a local time (+1200) but is also 12 hours behind.

When I use pytile directly I get the correct last_timestamp in UTC i.e. 2024-04-27 05:40:24.824000

I'm not sure but this may have started around when #106009 was fixed.

What version of Home Assistant Core has the issue?

core-2024.4.4

What was the last working version of Home Assistant Core?

No response

What type of installation are you running?

Home Assistant Container

Integration causing the issue

Tile

Link to integration documentation on our website

https://www.home-assistant.io/integrations/tile/

Diagnostics information

No response

Example YAML snippet

No response

Anything in the logs that might be useful for us?

Example line from debug logs showing result.last_tile_state.timestamp of 1714204427284 (about 2024-04-27 07:53 UTC) which showed up as 2024-04-26T19:53:47.284000+00:00 in the last_timestamp attribute:

2024-04-27 19:58:46.699 DEBUG (MainThread) [pytile] Data received from /tiles/abcdefghabcdefgh: {'version': 1, 'revision': 1, 'timestamp': '2tus': 'ACTIVATED', 'node_type': None, 'activation_timestamp': 1659310781143, 'name': 'Backpack', 'description': None, 'image_url': None, 'product': 'O': 'BACKPACK', 'owner_user_uuid': 'abcdefgh-19d5-4b35-a8e1-abcdefgh', 'thumbnail_image': None, 'group': None, 'tile_uuid': 'c4b5053749cd8fff', 'fion': {'fw10_advertising_interval': None}, 'last_tile_state': {'connectionStateCode': 0, 'ringStateCode': 0, 'uuid': 'abcdefghabcdefgh', 'tile_uuid': 'ent_rssi': 0.0, 'battery_level': 0.0, 'latitude': -41.0000000, 'longitude': 175.0000000, 'altitude': 74.4, 'raw_h_accuracy': 150.0, 'v_accuracy': 1.0,client_uuid': None, 'connection_event_timestamp': 0, 'last_owner_update': 0, 'partner_id': None, 'partner_client_id': None, 'speed_accuracy': 1.5, 'coFalse, 'h_accuracy': 150.0, 'voip_state': 'OFFLINE'}, 'firmware': {'expected_firmware_version': '41.04.10.0', 'expected_firmware_imagename': 'Tile_FW_4800000, 'expected_ppm': None, 'expected_advertising_interval': None, 'security_level': 1, 'expiry_timestamp': 2029564726523, 'expected_tdt_cmd_configcycle_start': '2023-01-09', 'battery_replaced_at': '1703715435579'}, 'battery_status': 'NONE', 'serial_number': None, 'auto_retile': False, 'all_user_780436, 'product_friendly_name': None, 'lf_id': None}}

Additional information

[home-assistant]

Hey there @bachya, mind taking a look at this issue as it has been labeled with an integration (tile) you are listed as a code owner for? Thanks!

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