This past weekend, Apple Watch 3 users reported an issue with their units where-in they said the device crashed upon being queried about weather information. Specifically, reports said the crash occurred when they asked the watch about weather information for the current day. It's worth mentioning that no crash was observed if the query was not weather-related or related to weather but not for the current day. A user on Reddit (where the problem was widely reported) said the problem is related to the end of Daylight Saving Time - the change happened this weekend. Here's what they...
Source: https://www.gsmarena.com/users_say_their_apple_watch_3_crashed_upon_asking_about_weather-news-28102.php