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Scheduling cron jobs at 2:00 or 3:00 AM on Sunday mornings can cause problems during daylight saving time transitions. When DST begins or ends, jobs scheduled at these times may run multiple times per second or behave unpredictably. The issue stems from vixie-cron's handling of time changes, where jobs can execute approximately 60 times in a single minute. Solutions include avoiding these specific times, setting server timezone to UTC to eliminate DST changes entirely, or scheduling jobs at slightly different times like 2:59 or 3:01 AM.

Avoid 2:00 and 3:00 am cron jobs!

one more to the phobias bucket yikes 😖

Scary edge cases for expensive functions

imagine having time as your worst enemy. Now that’s not new to me.