Time Zone Converter
Convert a date and time between world time zones, compare city times, offsets and next-day or previous-day shifts.
Convert time between cities
Time-zone converter SERPs are meeting and travel oriented: pick two cities, enter a local time, and see the equivalent time, offset and day shift.
tA is the source local time and Delta is the time-zone offset difference at that instant.
Daylight saving time matters
- Offsets can change during daylight saving transitions.
- The same city pair can have different differences in different months.
- IANA time-zone IDs are used for city presets and formatting.
- UTC has no daylight saving adjustment.
Frequently Asked Questions
Sources and References
- Time Zone DatabaseIANA
- Intl.DateTimeFormatMDN Web Docs
- Time Zone Convertertimeanddate.com
- World Time BuddyWorld Time Buddy
Calculations are based on the listed reference sources. Links open in a new tab.
Related Tools
Calculate sunrise, sunset, solar noon, day length and twilight times for a city or coordinates on any date.
Calculate day length, daylight changes, sunrise/sunset context and annual daylight patterns for a selected location.
Convert Unix epoch timestamps to dates and dates back to epoch seconds, milliseconds, microseconds and nanoseconds with UTC and local output.
Calculate the date difference between two dates or add and subtract calendar days from a start date, with full calendar breakdowns.