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Server time zone converter: one time in 12 zones

Type a date and time and the zone it is in. The table shows the same moment everywhere.

How to use it

Type a date and time such as 2026-11-13 09:00, choose the time zone in which you mean it, and read the list. The first row is your own device's zone. Each row gives the local time, the abbreviation of the zone and the offset from UTC at that moment, so you can see daylight saving at work: the same zone has different offsets in summer and winter.

For meetings

Use a date and time in the zone of the organiser and send the converted times to people in other zones. Include the zone name (Asia/Kolkata or IST) and the date: a time alone is not enough.

For servers and scheduled jobs

Servers are best set to UTC. Cron and scheduled jobs then run at a fixed UTC time and do not move when local clocks change. Convert your local time to UTC with the tool, and write the UTC time in the schedule. India has no daylight saving, so 09:00 India time is 03:30 UTC all year. The United Kingdom changes at the end of March and October, so 09:00 London time is 09:00 UTC in winter and 08:00 UTC in summer.

Clock changes

When clocks go forward, one hour does not exist: if you type a time in that hour, the tool says so. When clocks go back, one hour happens twice; the tool uses the first one. Try 2026-03-29 02:30 with the Europe/Berlin zone chosen to see a time that does not exist.

Zone names

The tool uses IANA zone names such as Asia/Kolkata and America/New_York, from the time zone database that most systems use. Abbreviations like IST are ambiguous (India, Israel and Ireland all use it), so prefer the full name in your own work.

Common mistakes

  1. Writing a time without a date. Offsets change during the year.
  2. Using an abbreviation that means different things.
  3. Scheduling a job at a local time that does not exist on the day of the clock change.
Which zone is IST?

India Standard Time is UTC+05:30. Israel Standard Time and Irish Standard Time share the abbreviation, so name the zone.

Why does the offset of New York change?

It changes between standard and daylight saving time.

This is an independent guide. It is not connected with the IERS, BIPM, IANA, NIST or any company named here. Facts were read on 14 November 2026 from the sources named on each page; calculated values come from Python.