DeveloperKit

Time Zone Converter

Compare UTC and the time in cities around the world side by side, convert a specific time between zones, and find overlapping hours. Free, private, and 100% in your browser.

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Compare Time Zones at a Glance

When servers run in UTC, teammates sit in different countries, and users are everywhere, converting times in your head leads to mistakes. This converter shows every zone you care about next to each other, with offsets, daylight saving status, and date changes.

Features

  • Side-by-side clocks

    UTC, your local time, and any IANA time zone with the current offset, abbreviation, and date, updated live.

  • Convert a specific time

    Pick a date and time in one zone and see the matching time everywhere else, including when the date changes.

  • 24-hour timeline

    Compare every hour of the day across zones, with working hours highlighted, to plan meetings or maintenance windows.

  • Daylight saving aware

    Offsets come from your browser's time zone database, so DST changes in the US, Europe, and elsewhere are always correct.

  • Your list is remembered

    Add or remove zones; your list is saved in this browser only.

  • Copy as text

    Copy the times in every zone as a plain list to paste into chat or an incident report.

How to Convert Between Time Zones

  1. See the current time in each zone, or choose "Pick a time" to enter a date, time, and zone.
  2. Add the zones you need and remove the ones you do not.
  3. Use the 24-hour timeline to compare hours; click an hour to show it everywhere.
  4. Copy the result as text to share it.

Frequently Asked Questions

What is the difference between UTC and GMT?

For everyday use they show the same time. UTC is the precise time standard used by computers and servers; GMT is the time zone of the United Kingdom in winter. The UK switches to BST (UTC+1) in summer, while UTC never changes.

Why should servers use UTC?

UTC has no daylight saving changes, so there are no missing or repeated hours, and logs from servers in different regions can be compared directly. Convert to local time only when displaying times to users.

Why do some time zones have 30 or 45 minute offsets?

Some countries chose offsets that match their geography better, such as India (UTC+5:30), Iran (UTC+3:30), and Nepal (UTC+5:45). The timeline shows those minutes in each hour.

What are IANA time zone names?

Names like Europe/Berlin or America/New_York identify a region's full history of offsets and daylight saving rules. They are more reliable than abbreviations such as EST or CET, which are ambiguous and change with the season.

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