Time Zone Converter
The same moment in two time zones, daylight saving included.
Time zone converter takes a time in one place and tells you what time that is somewhere else. Pick the source city, the time, and the destination — the result includes the date, which is the part people forget.
How it counts
The converter takes a moment in one zone and shows it in another, with daylight saving time already applied — zone rules come from the system time zone database.
Other calculators
- Date Difference
- Working Days
- Days Until a Date
- Days Since a Date
- Age Calculator
- Add or Subtract Days
- Meeting Planner
All date calculators · Date info
How to use Time zone converter
Choose the city or zone you are converting from. Enter the time and the date. The date is not optional — offsets change during the year. Choose the destination city or zone. Read the converted time and check the date next to it.
The date is half the answer
A conversion that returns only a clock time is incomplete. Between distant zones the result frequently lands on the day before or the day after, and a time given without its date is the single most common way remote arrangements go wrong. Someone reads "9:00" and books the wrong morning.
The rule is simple: whenever you send a converted time to another person, send the date with it, and name the zone. "9:00" means nothing on its own. "9:00 on Thursday, London time" cannot be misread. Every calendar mishap involving two countries begins with someone confidently saying a number without saying where.
Why offsets shift during the year
Many regions move their clocks seasonally, and they do not all move on the same dates. For a few weeks each spring and autumn the usual gap between two cities is temporarily different from what everyone remembers. This is why a recurring call that has worked for months suddenly happens an hour early.
Some regions observe seasonal clock changes; others do not at all. The changeover dates differ between regions that do observe them. Northern and southern hemispheres shift in opposite seasons. A gap you memorised in January may not be the gap in July.
The practical response is to convert with the actual date of the event rather than today's date, and to re-check any recurring commitment around the changeover periods.
Cities beat abbreviations
Convert by city or region rather than by zone abbreviation. Abbreviations are short, familiar and ambiguous — several are used by more than one part of the world, and some describe a summer offset that only applies for part of the year. A city name carries its whole rulebook with it, including whether and when the clocks move. When in doubt, name the place, not the acronym.
Questions and answers
- Why do I need to enter a date?
- Because the offset between two places is not constant. Seasonal clock changes mean the same pair of cities can be a different number of hours apart depending on when the event happens.
- Why is the result on a different day?
- Zones far apart can cross midnight or the date line, so a converted time legitimately falls on the previous or following day.
- Should I use zone abbreviations?
- Prefer city or region names. Abbreviations are ambiguous and several are used by more than one region.