Scheduled Jobs and Time Zones: The Midnight Bug I Keep Seeing

This story is from 2026-10-21. It is preserved in the archive; the latest stories are on the live feed.

Cron runs in UTC by default, so a "midnight" job can fire on the wrong local day Define the business day explicitly with a timezone string, never a UTC offset DST shifts your offset twice a year, which silently moves job times by an hour Test the four edge cases: midnight, month boundary, spring-fo…