Durations and schedules

Time Zone Difference Calculator

Regions can change clocks on different dates or not use daylight saving at all.

Noon avoids most clock-change transition hours while representing the selected date.

Select two cities and a date to calculate their UTC offsets and time difference.

Your result−6 hr 0 min

The target zone is behind the source zone.

The shared link contains the values you entered.

How it works

Difference = target UTC offset − source UTC offset at noon on the selected date.

The difference can change during the year when the two regions switch daylight-saving time on different dates.

Last verified: 29 September 2026

03FAQ

Is daylight saving time included?

Yes. The browser’s IANA time-zone data is applied for the selected date.

Why can the difference change?

Why is the calculation made at noon?