Time Zone Converter
Convert a date and time between any cities or time zones — daylight saving applied automatically for the date you pick — and line up working hours to find a meeting slot that suits everyone. Everything runs locally in your browser.
New to this? Read the Time Zone Converter guide →
Compare working hours
Each column is the same moment. White cells are 9am–5pm in that city; grey cells are night. Click a column to set the time — handy for finding a meeting slot that isn't 3am for someone.
How to use the time zone converter
- Pick a date and time, and the zone it's in — type a city (Tokyo, Berlin), an IANA zone, or an abbreviation like PST or IST.
- Read the converted time in every city in your list; add or remove cities freely (up to eight).
- Use the working-hours grid to spot a slot that suits everyone, then Copy link to share this exact conversion, or Copy all times to paste the list into a message.
Past and future dates work too, and daylight saving is applied per date — 3pm New York in January converts differently than in July, as it should.
Why city names beat abbreviations
Time zone abbreviations are ambiguous: IST is India, Israel and Ireland; CST is Central US, China and Cuba. This converter accepts the common abbreviations but resolves everything to an unambiguous IANA zone (like America/New_York) and shows you which one it picked, so a scheduling mistake can't hide behind three letters. The guide covers the worst offenders.
Private by design
All conversion happens in your browser using its built-in IANA time zone database — the same data your operating system uses. Nothing you type is uploaded, and the tool works offline once loaded. If you work with Unix timestamps, the timestamp converter is the sibling tool.
Frequently asked questions
How does the converter handle daylight saving time?
Automatically, per date. It uses the IANA time zone database built into your browser, so converting 3pm New York on a January date applies UTC−5 and the same time in July applies UTC−4. Rows show a DST badge when daylight saving is in effect on the chosen date.
Why does it show names like America/New_York instead of EST?
Because abbreviations are ambiguous — IST is India, Israel and Ireland; CST is Central US, China and Cuba. You can type the familiar abbreviations and city names, but the tool resolves them to an unambiguous IANA zone and shows which one it picked.
Can I convert a time in the past or the future?
Yes. Pick any date — the correct offset and daylight-saving rules for that specific date are applied, which matters because zones change their rules over the years and hemispheres shift on different dates.
What does the working-hours grid show?
Each column is the same moment across every city in your list; white cells are 9am–5pm locally and grey cells are night. Click a column to set the conversion to that hour — it makes the least-bad meeting slot visible at a glance.
Is anything I enter uploaded?
No. All conversion happens locally in your browser using its built-in time zone database, and the shareable link encodes the conversion in the URL itself — there is no server involved.