How to Convert Between Time Zones
Our time zone converter helps you find the equivalent time in any location worldwide. Essential for scheduling international meetings, planning travel, or coordinating across global teams.
Understanding Time Zone Conversion
Time zone conversion involves adding or subtracting hours based on the UTC offset of each location. When it's noon in New York (UTC-5), it's 5 PM in London (UTC+0) and 1 AM the next day in Tokyo (UTC+9).
Time Zone Conversion
Target Time = Source Time + (Target UTC Offset - Source UTC Offset). Account for date changes when crossing midnight.
Example:
Convert 3 PM in New York (UTC-5) to London (UTC+0): 3 PM + (0 - (-5)) = 3 PM + 5 hours = 8 PM London.
Common Use Cases
Real-world applications for this calculator
Meeting Scheduling
Find times that work for participants in different time zones.
Flight Planning
Calculate arrival times in local time when traveling across zones.
Live Events
Know when a broadcast or event in another country will air in your local time.
Tips
- Always specify the time zone when scheduling international meetings.
- Use world clock apps that adjust for DST automatically.
- The date may change when converting between distant time zones.
- Consider using UTC for international coordination to avoid confusion.
Frequently Asked Questions
How do I convert time zones?
Find the UTC offset for both locations, calculate the difference, then add or subtract from your source time. If the result goes past midnight, adjust the date accordingly.
What happens during daylight saving time changes?
During DST transitions, the offset changes by 1 hour. Make sure to use the correct offset for the specific date you're converting. Not all countries change on the same dates.
How many hours ahead is Tokyo from New York?
Tokyo is 14 hours ahead of New York during standard time (EST) and 13 hours ahead during daylight saving time (EDT). Japan does not observe DST.
What is the best time for international calls?
Aim for overlap during business hours (9 AM - 6 PM) in both locations. For US-Europe calls, late morning US / late afternoon Europe works well. For US-Asia, early morning US / evening Asia is often best.
Why does the date change when converting?
If conversion pushes the time past midnight, you cross into the next day; before midnight of the previous day, you go back a day. A Friday 11 PM in New York is Saturday 4 AM in London.