Dates & Time
2 articles
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A Checklist for Testing Dates, Time and Time Zones
Dates are a source of bugs that surface in production six months later. A practical checklist: storing in UTC, time zones, daylight saving (DST), date formats, boundaries (midnight, end of month, Feb 29), calculations across DST, relative time, and how to reproduce it all.
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Checklist for testing date and time fields
A 'pick a date' field looks innocent — but date/time fields fail more tests in production than anything else. Time zones, DST transitions, locales, leap years — every item has shot someone.