Time Zone Converter
Convert a time in one city to several others at once, for any date. Daylight saving time is applied for the date you pick, so the converter also gets right the weeks when one country has changed its clocks and another hasn't.
Formula
Worked Example
New York is back on Eastern Standard Time (UTC−5) after the clocks changed on November 1, so London (UTC+0) is 5 hours ahead, Mumbai (UTC+5:30) 10½ hours ahead and Tokyo (UTC+9) 14 hours ahead.
Frequently Asked Questions
Why is New York sometimes only 4 hours behind London?
The US and Europe change their clocks on different dates. In 2026 the US springs forward on March 8 and falls back on November 1, while the UK and EU change on March 29 and October 25. For those few weeks in March and late October the gap is 4 hours instead of 5.
Which places don't use daylight saving time?
Most of Asia and Africa and much of South America, as well as Arizona (outside the Navajo Nation), Hawaii and Puerto Rico in the US. India, China and Japan keep one offset all year, so their difference from US and European cities shifts by an hour twice a year.
Why are some time zones offset by 30 or 45 minutes?
Time zones are set by governments, not by geometry. India uses UTC+5:30 so one clock covers the whole country, Iran uses UTC+3:30, Nepal UTC+5:45, and central Australia UTC+9:30.