Debugging Timezone Bugs
Time bugs usually live at day boundaries, DST changes, and unit conversions.
Pattern
Code assumes local, UTC, seconds, or milliseconds in the wrong place.
warningSymptoms
- arrow_rightReports missing records
- arrow_rightExpiry happens early or late
- arrow_rightOnly one timezone reproduces the incident
searchWhere to look
- arrow_rightDate parsing
- arrow_rightBoundary queries
- arrow_rightScheduler timezone
- arrow_rightSeconds vs milliseconds
buildCommon fixes
- arrow_rightStore UTC instants
- arrow_rightMake timezone explicit
- arrow_rightTest boundary dates