Time Zone Converter
One moment, seventeen cities at once — with live offsets, day changes and daylight saving marked.
Runs in your browserReference moment
With this on, the reference moment keeps up with your own clock and the fields are locked. Turn it off to convert a moment of your choosing — the start of a call abroad, say.
The same moment elsewhere
Click a row to copy that city's date and time.
About this tool
Scheduling across time zones fails in two ways. The first is arithmetic: someone adds or subtracts a fixed number of hours, forgetting that the offset changes twice a year in much of the world. The second is the calendar: an afternoon in Los Angeles is the next day in Tokyo, and it is easy to lose track of which date is which. This page takes one moment and shows it everywhere at the same time, with the actual current offset for each place, a marker when a zone is on daylight saving, and a clear sign when a city has crossed into a different date. Offsets come from the browser's own time zone database, so each region's real rules apply, and nothing is sent anywhere to be looked up.
How to use it
- 1Leave "follow the clock" on to convert the present moment, live. Turn it off when you want to plan: the date and time fields unlock and you can enter any moment you like.
- 2Scan the list. Each row shows the city, its date and time at that moment, the zone's current offset from UTC, and how far ahead or behind it is compared with your own time zone.
- 3Watch the two markers. "DST" means that zone is on daylight saving time at that moment, and a day tag appears whenever that city is on a different calendar date from you. Click any row to copy its date and time.
Frequently asked questions
Where do the offsets come from, and do they handle daylight saving?
They come from the time zone database built into your browser, which is the same data an operating system uses in its clock settings. That matters because offsets are not fixed constants: London is UTC+0 in winter and UTC+1 in summer, and several countries have changed their rules in the last decade. Rather than store a number per city, this page asks the browser what a given zone's clock reads at the exact moment you have selected, so what you see is the real offset for that date, not an average.
The list says a city is on the next day. Which date should I quote in a message?
Always quote the city's own local date, and name the city rather than a zone abbreviation. The day tag exists exactly so you notice the mismatch before you send the message. Writing "Tuesday 3pm Berlin time" is unambiguous; writing "tomorrow afternoon" is not, and neither is "CET" — abbreviations are ambiguous between continents and misleading during daylight saving, when many of them are technically not in force.
Can I convert a date far in the past or the future?
You can enter any date the input accepts, and the offset shown will be the correct historical or future offset for that moment as recorded in the database. Be aware of the limits of that evidence: future rules are only as good as the legislation currently in force, and governments do change them at short notice. For anything more than a year ahead, treat the result as the best available prediction rather than a guarantee.