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Date & Time Calculators

Time Zone Calculator

Convert a date and time from one city’s time zone to another to plan calls and travel. Daylight saving time is applied automatically for the date you choose, using your browser’s time zone database.

Enter your values and press Calculate to see the result and the working.

How to use the Time Zone Calculator

  1. Choose the date and time as it is in the first city.
  2. Choose the two time zones.
  3. Press Convert.

Formula

Target time = source local time − source UTC offset + target UTC offset. Offsets come from the IANA time zone database for the exact date, so daylight saving changes are included.

Examples

  • 9:30 am in India (UTC+05:30) on a November weekday is 11:00 pm the previous day in New York (UTC−05:00).

Frequently asked questions

Why does the difference change during the year?

Countries that observe daylight saving move their clocks forward in summer, so the gap to countries that don’t (such as India) changes by an hour.

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