Time Zone Calculator
Choose a time, source zone and destination zone to display the corresponding local time.
Compare times with a date
The time difference depends on both location and date. The calculator uses named time zones, so daylight-saving rules valid on the selected date are included.
See calendar-day changes
If the destination time falls on the previous or next calendar day, the result states that difference explicitly. This is useful for international meetings and travel.
Frequently Asked Questions
Why does the calculator ask for a date?
UTC offsets can change with daylight-saving rules. The date lets the calculator use the offset valid for that day.
Does it account for daylight saving time?
Yes. It uses named IANA time zones and the time-zone data available in your browser rather than fixed winter offsets.
What does previous or next day mean?
It means the destination local date differs from the source local date even though both times describe the same instant.
What is UTC?
UTC is the international time standard used as a common reference for civil time zones.
Why can two cities change their time difference?
Regions can start and end daylight saving time on different dates, so their difference may briefly change.
Can I use this for scheduling a meeting?
Yes. Select the meeting date and source time, then verify the displayed destination date as well as the time.