The Lab · Written in the open · Tagged Scheduling

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Working notes from the studio. The tools I build, the workflows I keep, the mistakes I paid for.

1 entries · latest 2026-10-21

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RAXXO Studios 9 min read

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

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...

BackendSchedulingTutorials
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TLDR This entry in one minute
  • 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

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