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Tools / Time zone converter

Time zone converter

Pick a date and time in one zone and read it in any number of others at once — for scheduling a call, a flight or a deploy window. It uses your browser’s own copy of the time-zone database, so daylight saving and rule changes are handled correctly rather than by a stale offset table.

Runs entirely in your browser

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About this tool

Scheduling across time zones is where meetings, flights and deploy windows go wrong. This converter lets you pick a date and time in one zone and read the same instant in as many other zones as you need, side by side. Instead of doing offset arithmetic in your head, you see exactly what 3 pm in London is for colleagues in New York, Bengaluru and Sydney at once.

The accuracy comes from using your browser’s own copy of the IANA time-zone database rather than a fixed table of offsets. That means daylight saving transitions and historical rule changes are applied correctly — a zone that is five hours behind in winter and four in summer is handled automatically, which a static offset would get wrong for half the year.

Everything runs locally in your browser, so your schedule stays private. Use it to find a call time that works for everyone, to translate an itinerary, or to plan a maintenance window against multiple regions.

Frequently asked questions

Why is this more accurate than adding or subtracting hours?
Because fixed offsets ignore daylight saving. A zone’s offset changes across the year, so simple arithmetic is wrong for part of it. This tool uses the time-zone database to apply the correct rules for the chosen date.
How many zones can I compare at once?
As many as you need. You pick a source time in one zone and read it simultaneously in any number of others, which is ideal for scheduling across several regions.
Does it handle daylight saving time automatically?
Yes. Because it relies on the IANA time-zone rules in your browser, DST transitions and rule changes are applied for the specific date you choose.
What are the common abbreviations like IST, EST and PST?
They are short names for particular zones (for example Indian Standard Time, US Eastern and US Pacific). The converter works from full zone definitions so it applies the right offset and DST behaviour rather than an ambiguous abbreviation.
Is my schedule sent anywhere?
No. The conversion happens in your browser, so the times and zones you enter stay on your device.

Enjoying Time zone converter?

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