Time Difference Calculator
Convert a date and time from one city’s time zone to another’s and see the time difference between them, with daylight saving time handled automatically.
How time zone conversion works
Every time zone is an offset from Coordinated Universal Time (UTC). To convert, change the time to UTC using the first zone’s offset, then apply the second zone’s offset. Many places shift their offset by an hour for daylight saving time, which this calculator handles automatically.
Worked example
9:00 AM in New York on October 20, 2026 is during daylight saving time (UTC−4), so it is 13:00 UTC. Karachi is UTC+5, making it 6:00 PM there, a difference of 9 hours.
Daylight saving time
The US moves clocks back on the first Sunday of November, while the UK and EU change on the last Sunday of October. In the weeks between, the gap between New York and London is one hour shorter than usual.
Frequently asked questions
What is UTC?
Coordinated Universal Time, the global time standard that all time zones are measured from.
Why does the time difference change during the year?
Daylight saving time starts and ends on different dates in different countries, and some places do not use it at all.
Does Pakistan use daylight saving time?
Not currently. Pakistan Standard Time stays at UTC+5 all year.
How do I schedule a meeting across time zones?
Convert the proposed time for each participant and look for an overlap within normal working hours.
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