Time Zone Converter — Convert Between Time Zones (DST-Safe, Private)

Convert a date & time from one time zone to others. Fully client-side and DST-aware.

1) Choose time & zones

Interpreted in the Base zone below.
Tip: auto-detected to your device zone.
Pick a date/time and zones to convert.

2) Overlap suggestions (working hours)

Shows times where all selected zones are between 09:00–17:00 local. Based on the chosen date.

About this Time Zone Converter

Enter a date & time in a base time zone and instantly see it in one or two other time zones. The converter uses IANA time zone rules via the browser’s internationalization engine, so daylight saving transitions are handled automatically.

Use the 12-hour toggle, the Now shortcut, and the Copy Link button to share a pre-filled conversion with others. Everything runs locally in your browser—nothing is uploaded or stored.

Note: Some wall times don’t exist during DST “spring forward”; we nudge to the next valid minute.

Time Zone Converter: FAQs

Does this handle daylight saving time?

Yes. Conversions use the selected IANA zones with their DST rules.

Why is my time adjusted slightly on DST change dates?

Some wall times are skipped or repeated during DST changes. The tool finds the nearest valid instant.

Can I share a specific conversion?

Yes. Click Copy Link to copy a permalink containing your date/time and zones.

Is my data private?

Yes. The converter works entirely in your browser.

5 Fun Facts about Time Zones

Tomorrow already?

The world’s “future” is UTC+14 (Kiritimati). When it’s Monday morning there, it’s still Sunday afternoon in Honolulu—26 hours apart.

Date line magic

Offsets aren’t just whole hours

India runs on UTC+5:30, Nepal on UTC+5:45, and the Chatham Islands use UTC+12:45. Your converter handles those quirky fractions.

Half & quarter hours

One country, five solar zones

All of China uses Beijing time (UTC+8) even though it spans the width of the U.S. Sunrises and sunsets can differ by several hours across the country.

Shared clock

Not all DST jumps are +1 hour

Australia’s Lord Howe Island advances by 30 minutes for daylight saving. Some DST transitions even make 23- or 25-hour days.

Odd DST

Far-flung “France”

Counting overseas territories, France spans 12 time zones—more than any other country, from UTC−10 in Polynesia to UTC+12 in New Caledonia.

Wide reach

Explore more tools