Most simple time zone converters quietly assume a fixed offset between two places — and get it wrong for months at a time. Our new Time Zone Converter asks each zone what its real offset was on the exact date you enter, on both ends of the conversion.
- Date-aware, not a fixed offset — “New York is 5 hours behind London” is only true part of the year. This tool checks the real Daylight Saving Time status of both the source and destination zone for your specific date, so summer and winter conversions are both correct automatically.
- Handles one-sided DST correctly — some pairs of zones both observe Daylight Saving Time, some have only one side that does, and some have neither. All three cases work without any special handling on your part.
- Common IANA zones, no free text — pick from a dropdown of familiar cities (New York, London, Athens, Tokyo, Sydney, and more) mapped to their real IANA identifiers, so there’s no ambiguity about which “Central Time” or “IST” you meant.
- Shows the underlying UTC instant — for anyone who wants to double-check the math, the exact universal time behind the conversion is displayed alongside the result.
- Private by default — the whole conversion runs through your
browser’s own
IntlAPI and time zone database; nothing you enter is sent to a server.
Try converting 2:30 PM in New York to Athens time in both July and January — the seven-hour gap holds in both cases, but only because both zones happen to shift their clocks by the same hour. Pair a DST-observing zone with one that doesn’t (say, London to Tokyo) to see how the gap itself changes between summer and winter.