fix(cron): naive ISO timestamps stored without timezone — jobs fire at wrong time - #1729
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User-provided ISO timestamps like '2026-02-03T14:00' (no timezone) were stored naive. The _ensure_aware() helper at check time interprets naive datetimes using the current system timezone, but if the system timezone changes between job creation and checking, the job fires at the wrong time. Fix: call dt.astimezone() at parse time to immediately stamp the datetime with the local timezone. The stored value is now always timezone-aware, so it's stable regardless of later timezone changes.
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…one-naive-iso fix(cron): naive ISO timestamps stored without timezone — jobs fire at wrong time
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…one-naive-iso fix(cron): naive ISO timestamps stored without timezone — jobs fire at wrong time
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…one-naive-iso fix(cron): naive ISO timestamps stored without timezone — jobs fire at wrong time
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…one-naive-iso fix(cron): naive ISO timestamps stored without timezone — jobs fire at wrong time
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…one-naive-iso fix(cron): naive ISO timestamps stored without timezone — jobs fire at wrong time
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Summary
User-provided ISO timestamps like
2026-02-03T14:00(no timezone) were stored as naive datetimes. At check time,_ensure_aware()interprets them using the current system timezone. If the system timezone changes between job creation and checking (e.g., server migration, DST change), the job fires at the wrong wall-clock time.What changed
cron/jobs.py: Inparse_schedule(), calldt.astimezone()on naive datetimes to immediately stamp them with the local timezone. The storedrun_atvalue is now always timezone-aware (e.g.,2026-02-03T14:00:00-08:00), so it's stable regardless of later timezone changes.Timestamps that already include timezone info (e.g.,
2026-02-03T14:00+02:00orZ) are unaffected.Test plan
python -m pytest tests/cron/ -n0 -q→ 54 passed, 3 skipped ✔2026-06-01T09:00→ verify storedrun_atincludes timezone offset