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Time Zone Converter

Convert a date and time from one time zone to up to 10 others. See the local time, weekday, UTC offset and whether it falls on the previous or next day, with daylight saving time handled for the exact date.

Convert from
UTC offsets in the lists are for today. The conversion uses the offset in effect on the date you enter.
Convert to
Up to 10 time zones.

Time zone and daylight saving rules come from your browser.

How to use the time zone converter

  1. Under Convert from, the date and time start at your current local time and the time zone is set to the zone your device uses. Change any of them, for example to the start time of a meeting.
  2. Under Convert to, pick the time zones you want to compare. The list starts with your own zone and two widely used ones. Use Add time zone for more rows (up to 10) and the × button to remove one.
  3. The result updates as you change a value. Use current time jumps back to now.

Each row shows the converted time in 24-hour and 12-hour form, the weekday and date, the UTC offset on that date and the day change, such as +1 day when the place is already in tomorrow. Your chosen zones are remembered in this browser.

How the conversion works

Every time zone is defined by its offset from Coordinated Universal Time (UTC), and many zones change that offset for daylight saving time (DST). The converter first finds the exact moment in UTC that matches your date and time in the source zone, using the offset in force on that date, not today's. It then shows that same moment in each target zone. The rules come from the IANA time zone database built into your browser, so nothing is sent to a server.

Worked example

A call is set for 09:00 in New York on Friday, March 20, 2026. New York switched to daylight saving time on March 8, so it is at UTC−4, while London does not switch until March 29 and is still at UTC±0. At that moment it is:

  • 13:00 in London (only 4 hours ahead instead of the usual 5)
  • 18:30 in Kolkata (UTC+5:30)
  • 22:00 in Tokyo (UTC+9)
  • 00:00 on Saturday, March 21 in Sydney (UTC+11), shown as +1 day

One month later, on April 20, the same 09:00 in New York is 14:00 in London again.

Daylight saving gaps and overlaps

When clocks spring forward, one local hour is skipped. In New York on March 8, 2026, the clock goes from 01:59 straight to 03:00, so 02:30 never happens. If you enter a time in such a gap, the converter moves it forward by the length of the jump (02:30 becomes 03:30) and tells you so.

When clocks fall back, one hour happens twice. In New York on November 1, 2026, 01:30 occurs first on daylight time (UTC−4) and again an hour later on standard time (UTC−5). The converter uses the first occurrence and shows the offset of the second one, so you can adjust if you meant the later one.

Good to know

  • Offsets in the drop-down lists are for today; the conversion always uses the offset on the date you enter.
  • Some zones are not whole hours from UTC, such as India (UTC+5:30) and Nepal (UTC+5:45).
  • Dates from 1900 to 2100 are supported. Rules for future years assume today's laws stay the same.

Frequently asked questions

Does the converter handle daylight saving time?

Yes. It uses the offset that applies on the date you enter in each zone, so a conversion for July can differ by an hour from the same conversion in January. Times that fall in a spring-forward gap or a fall-back overlap are explained in the result.

Why is the gap between two cities different from usual?

Countries change their clocks on different dates. The United States moves to daylight saving time in early March and the European Union at the end of March, so for a few weeks New York is only 4 hours behind London instead of 5. The same happens in late October and early November.

What does +1 day or −1 day mean?

It compares the calendar date in the target zone with the date you entered in the source zone. +1 day means the place is already on the next day at that moment, and −1 day means it is still on the previous day.

Why does my time zone have an unfamiliar name?

Time zones are named after a major city in the region, following the IANA database, for example America/New_York for most of the eastern United States or Europe/Paris for France. Your own zone comes from your device settings.

Is anything sent to a server?

No. The conversion runs entirely in your browser using its built-in time zone data. Your selected zones are stored only in your own browser so they are there next time.