Time Zone Converter
Convert a wall-clock time from one named zone to another. Daylight-saving changes are resolved for the exact date you enter.
Converted time
How it works
You name a time in one zone; the tool resolves it to an absolute moment and reads the clock in the second zone for that same moment. Offsets are looked up for the exact date you enter, so a daylight-saving change between the two dates is handled by the engine rather than assumed.
Honest edge cases
- If the clock springs forward past the time you entered, the tool says so and shows the nearest real time.
- If the clock falls back and the time occurs twice, the tool shows both the earlier and the later instance.
- Fixed zones like UTC and Singapore always return the same offset.
Offsets use the browser's current IANA time zone data; pre-1970 history is not reconstructed.
Frequently asked questions
Are time zone offsets hard-coded?
No. The offset is read for the specific date you enter, using the browser's IANA time zone data. Daylight-saving changes are handled automatically, per date.
What happens around a spring-forward gap?
A wall time that the clock skips, such as 2:30 AM on the day the United States springs forward, does not exist. The tool flags it and offers the nearest real time.
What happens on a fall-back overlap?
When clocks fall back, a wall time such as 1:30 AM occurs twice. The tool surfaces both the earlier and the later instance so you can choose the one you mean.
Why do the offsets differ by date?
Zones transition on different dates — the European Union and the United States spring forward on different Sundays. Because the offset is resolved per date, this is handled correctly.
Does it handle zones without daylight saving?
Yes. Fixed-offset zones such as UTC or Singapore return the same offset every day.
How far back is historical time accurate?
The tool uses the browser's current IANA time zone data. Offsets before 1970 and long-past historical rules are not reconstructed.