Free Time Zone Converter
It is 3 p.m. in London - what time is that in Tokyo, and is it still the same day? Pick any date and time, choose the from and to zones, and get an instant daylight-saving-aware conversion across 28 world time zones, with a swap button for quick reverse lookups.
How to Use the Time Zone Converter
- Enter the date and time in the source time zone.
- Select the "from" and "to" time zones.
- Click Convert — offsets and daylight saving are handled automatically.
Features
Twenty-eight major world time zones are available on both sides of the conversion, with offsets computed for your exact date so daylight saving is applied correctly. The swap button flips the zones instantly for reverse checks, and results make clear when the converted time lands on a different date.
Benefits & Use Cases
Travelers work out arrival times, global teams schedule without the mental math, and broadcasters convert show times for international audiences. Anyone calling family abroad can check "is it a reasonable hour there?" in seconds.
Tips
Conversions are date-specific because daylight saving shifts offsets through the year - always enter the real date. Large offsets can move the result to the previous or next day, so read the full date, not just the time. The swap button is the fastest way to double-check a conversion in reverse.
Frequently Asked Questions
How many time zones are supported?
Twenty-eight major world time zones, covering the cities and regions most people need for travel and business.
Does it handle daylight saving time?
Yes. The offset for each zone is computed for the exact date you enter, so DST is applied correctly on both sides of the conversion.
Why did the date change as well as the time?
Large time differences can push the converted moment into the previous or next day. The result always shows the full date so nothing is ambiguous.
Can I quickly reverse a conversion?
Yes - the swap button exchanges the from and to zones instantly, so you can verify the conversion both ways.
What is the difference from the World Clock?
The converter shifts one specific date and time between zones. The World Clock shows the live current time in 12 cities at once.
Is the converter free?
Yes. Free, private and no sign-up required.
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