Timezone Converter
About the Timezone Converter
This tool converts a wall-clock date and time from one IANA time zone to another. Daylight saving time is handled automatically for the specific date you pick, so offsets are always correct for that moment.
Alongside the converted time you get the ISO 8601 string with the proper UTC offset, the UNIX timestamp, and a world-clock table showing the same instant in major cities. Everything runs locally using your browser's Intl API.
How to convert time between zones
- Pick a date and time, or click “Now” for the current moment.
- Choose the source time zone the time is expressed in.
- Choose the target time zone.
- Read the converted time, ISO 8601 value, and UNIX timestamp, or copy any of them.
Tips
- Always use IANA identifiers like Europe/Kyiv — abbreviations such as CST are ambiguous.
- Check the resulting calendar date: conversions often cross midnight.
- Offsets change on DST transition days, so verify recurring meetings for both summer and winter.
- Store timestamps in UTC and convert only for display.
Related guides
Learn the workflow behind this tool and what to check next.
Time zone checks before scheduling across regions
A converted wall-clock time is only correct if the zone, DST rules, and date are right. Review these points before sending an invite.
Use IANA zone names
Prefer identifiers like Europe/Kyiv or America/New_York over abbreviations such as EST, which are ambiguous.
Check the date, not just the time
Crossing midnight shifts the calendar day. Confirm the day of week in the target zone before scheduling.
Remember DST transitions
Offsets change during daylight saving switches. A meeting that works in March may collide in November.
Store UTC, display local
Persist timestamps in UTC and convert for display only, so records stay comparable across regions.
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