StraightToolsTime Zone Converter
Convert a date and time between major world time zones.
Daylight saving time
Modern browsers use the IANA time-zone database and automatically account for daylight-saving rules for the selected locations.
When to use this tool
Use the time-zone converter to translate a specific local date and time from one major city zone to another. It is designed for meetings, live events, deadlines, and travel planning.
How the result is calculated
The converter uses named IANA time zones rather than a fixed UTC offset, allowing the browser to account for daylight-saving rules on the selected date.
Worked example
A 3:00 PM meeting in New York can map to a different London time depending on the date because daylight-saving transitions do not always occur on the same weekend.
What to keep in mind
Ambiguous local times can occur when clocks move backward, and nonexistent local times can occur when clocks spring forward. Confirm mission-critical schedules with the event organizer.
About our calculations
StraightTools is designed to show the method behind the answer, not just the result. Inputs are handled in your browser for this tool. For important financial, legal, medical, tax, safety, or contractual decisions, verify the result with an appropriate authoritative source or qualified professional.