Sometimes you are defining a date by the local time. I have a meeting on June 13th 2026 at 15:00 london time. This could be 2026-06-13 14:00:00 Z But if the

Sometimes you are defining a date by the local time. I have a meeting on June 13th 2026 at 15:00 london time. This could be 2026-06-13 14:00:00 Z But if the U.K. drops summer time, or makes it double summer time, the meeting will still be 1500 london time, but the UTC time might change to 1500Z or 1300Z