timezones.now — Every Time Zone, Live

More on timezones.now

Time Zone Converter Convert Convert any time between any two zones — daylight saving handled automatically. World Clock World Current local time in major cities across every region, updating live. UTC Offsets Offsets Every UTC offset from −12:00 to +14:00, with the current time and representative places. Time Zone Abbreviations Abbrev What EST, CST, IST, BST and the rest actually mean — including the ones that mean several things.

timezones.now is a working reference for the world's time zones. Search every IANA zone with its current time, convert between any two with the time zone converter, scan the world clock, check the UTC offset table, or untangle time zone abbreviations. Everything reads your browser's own time-zone database, so daylight saving is always current.

Zones are political, not geometric

The tidy picture of twenty-four wedges of longitude has never been true. Zone boundaries follow borders, commerce and history, offsets range from UTC−12:00 to UTC+14:00, and some are offset by thirty or forty-five minutes. China spans five geographic wedges on a single clock. Our guides cover the database behind all of it, the offsets, daylight saving worldwide, and the traps that catch software.

From our guides

Browse all articles →

Time zones explained Daylight Saving Time Around the World: Who Changes Their Clocks, and When Which countries still move their clocks, how the northern and southern seasons differ, which nations have abandoned the practice, and why no two regions change on the same date. 5 min read Time zones explained Half-Hour Time Zones and Quarter-Hour Offsets: Why Some Clocks Sit Off the Hour India, Nepal, Newfoundland and the Chatham Islands keep clocks that are thirty or forty-five minutes off the hour. Where those offsets came from, and the bugs they still reveal. 5 min read Time zones explained Historical Time Zone Changes: How Countries Move Their Clocks Countries move their clocks by decree, sometimes with days of notice. A record of the notable shifts, and why converting an old timestamp needs the rules that applied at the time. 5 min read Time zones explained How Many Time Zones Are There? Why 24 Is the Wrong Answer The world does not have 24 time zones. Counting by UTC offset gives close to forty, counting by IANA identifier gives several hundred, and both answers are correct. 5 min read Time zones explained The IANA Time Zone Database: What It Is and Why Software Needs It A plain explanation of the IANA time zone database: what it records, who maintains it, how its Area/Location zone names are built, and why software cannot manage without it. 5 min read Reference tables Time Zone Abbreviations Are Ambiguous: Why IST, CST and BST Mean Several Things IST, CST, BST and AST each stand for several different zones with different offsets. A reference to the worst clashes, why no standards body governs them, and what to record instead. 5 min read Reference tables Time Zones for Developers: What to Store, What to Trust, What to Test A working reference on time zones for developers: what to persist, why offsets and abbreviations are not identifiers, how to survive daylight saving transitions, and how to keep zone data fresh. 5 min read Reference tables UTC Offsets Explained: The Full Range From UTC−12 to UTC+14 A reference guide to UTC offsets: the full range from UTC−12 to UTC+14, why it spans more than a day, the places at each extreme, and why an offset is not a time zone. 5 min read

Frequently asked questions

Is timezones.now free?

Yes — free, no signup, no download.

How many time zones are there?

It depends what you count. There are around 38 distinct UTC offsets in use and several hundred IANA zone identifiers, because zones track places and their histories rather than lines of longitude.

What is the difference between UTC and GMT?

UTC is the modern atomic standard and GMT is the older astronomical term for the same reference. For everyday scheduling they are interchangeable; for technical work UTC is the correct term.

Is daylight saving handled?

Yes, everywhere on the site — all times come from your browser's current time-zone data rather than fixed offsets.

Does anything get uploaded?

No. Every clock and conversion runs locally in your browser.