The Time Zone Converter converts a date and time from any time zone to any other — covering all major time zones worldwide including daylight saving time adjustments.

Time Zone Converter

Convert a date and time between any two time zones.

Converted Time
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How to Use This Calculator

  1. Enter the Date and Time you want to convert.
  2. Select the From time zone — the zone the entered time is in.
  3. Select the To time zone — the zone you want to convert to.
  4. Click Convert.

Common Time Zone Offsets (UTC)

  • PST / PDT: UTC−8 / UTC−7 (Los Angeles, Vancouver)
  • MST / MDT: UTC−7 / UTC−6 (Denver, Phoenix)
  • CST / CDT: UTC−6 / UTC−5 (Chicago, Mexico City)
  • EST / EDT: UTC−5 / UTC−4 (New York, Toronto)
  • GMT / BST: UTC+0 / UTC+1 (London)
  • CET / CEST: UTC+1 / UTC+2 (Paris, Berlin, Rome)
  • IST: UTC+5:30 (Mumbai, New Delhi)
  • JST: UTC+9 (Tokyo, Seoul)
  • AEST / AEDT: UTC+10 / UTC+11 (Sydney)

Daylight Saving Time

Daylight Saving Time (DST) shifts clocks forward 1 hour in spring and back in fall in most of North America and Europe. This calculator uses the browser’s built-in Intl.DateTimeFormat API, which automatically applies the correct DST offset for the given date and time zone — no manual adjustment needed.

Frequently Asked Questions

Does this handle half-hour and 45-minute offsets?

Yes. Time zones like India (UTC+5:30), Nepal (UTC+5:45), and some Australian states (UTC+9:30) are fully supported through the IANA time zone database used by modern browsers.

What if I need to schedule a meeting across time zones?

Enter the meeting time in your local time zone and convert it to each participant’s zone. Check all converted times to confirm they fall within reasonable working hours for each participant.

Tips for Scheduling Across Time Zones

  • Always state the zone: Write “3 PM EST” rather than just “3 PM” to avoid confusion.
  • Aim for overlap: When teams span continents, find the few hours that fall within everyone’s working day.
  • Watch daylight saving: Not all regions observe it, and they switch on different dates, so the gap between two cities can change by an hour during the year.
  • Use the recipient’s zone: When inviting someone, convert the time into their local time as a courtesy.

Understanding UTC and Offsets

Coordinated Universal Time (UTC) is the global reference from which all time zones are measured as offsets. New York is UTC−5 (or UTC−4 during daylight saving), London is UTC+0/+1, and Tokyo is UTC+9. To convert between two zones, you can add the time difference between their offsets — this calculator does it for you, including daylight-saving adjustments.

Common Uses

Time-zone conversion is essential for scheduling international video calls, watching live sports or product launches happening abroad, coordinating with remote colleagues and freelancers, and planning travel arrivals and departures across regions.

How it works

Conversion uses the browser's Intl.DateTimeFormat API with IANA time zone identifiers. The input datetime is interpreted as being in the "from" time zone by computing the UTC offset for that zone at that specific moment (handling DST automatically), then reformatting the UTC time in the "to" time zone.

Formula

UTC offset is derived from Intl.DateTimeFormat for the "from" zone; the UTC time is then formatted with Intl.DateTimeFormat for the "to" zone.