Time Zone Converter
Convert a date and time between time zones for your trip.
How Time Zones Work
Every location on Earth follows a time zone, which is typically defined as an offset from Coordinated Universal Time (UTC). Many time zones also observe daylight saving time, shifting their offset by an hour for part of the year. To convert a date and time from one zone to another, the calculator first determines the exact UTC moment the source date and time represents, then displays that same moment using the destination time zone's rules.
Common Travel Time Zone Issues
Travelers often run into confusion when coordinating across time zones, especially when daylight saving time changes are not aligned between locations, or when a flight or meeting time crosses midnight and lands on a different calendar date in the destination time zone. Double-checking converted times before booking flights, scheduling calls, or planning connections can help avoid missed departures and scheduling conflicts.
Time Zone Converter vs. Flight Duration Calculator
This calculator converts a specific date and time between two time zones — it doesn't calculate elapsed travel time. Once your departure and arrival times are in the same reference, use the Flight Duration Calculator to find out how long the trip actually took.
Planning For Jet Lag
Knowing the time difference between two zones is also the first step in estimating how hard the adjustment will be. Use the Jet Lag Planner to estimate your recovery time after crossing time zones.
FAQ
How does this calculator handle time zone conversions?
The calculator combines your source date and time with your source time zone to determine the exact moment in time. It then displays that same moment in the destination time zone, automatically accounting for the offset between the two zones, including daylight saving time where applicable.
Why does the destination date sometimes differ from the source date?
Time zones can be many hours apart, so the same moment in time can fall on a different calendar date depending on where you are. The calculator shows the correct destination date, whether that means the same day, the previous day, or the next day.
What does the time difference value mean?
The time difference shows how far ahead or behind the destination time zone is compared to the source time zone, at the specific date and time you entered. A positive value means the destination is ahead, and a negative value means it is behind.
Does this calculator account for daylight saving time?
Yes. The calculator uses the actual time zone rules for the date you select, so it automatically reflects daylight saving time changes in either the source or destination time zone.
Why should I use IANA time zone names instead of abbreviations?
Abbreviations such as EST or CET can be ambiguous or shared by multiple regions with different rules. IANA time zone names, such as America/New_York or Europe/Paris, uniquely identify a location's time zone rules, including how and when daylight saving time applies.
When should I use the Flight Duration Calculator instead?
Use this calculator to convert a specific date and time between zones. Use the Flight Duration Calculator to find the elapsed time between a departure and arrival.
Related Tools
Flight Duration Calculator
Estimate flight times between destinations.
Jet Lag Planner
Estimate your jet lag adjustment time when crossing time zones.
Schengen Calculator
Calculate Schengen Area days used and days remaining under the 90/180-day rule. Add your stays to check compliance and find your next eligible entry date.