Timezone Converter
Enter a date and time, then convert it to another timezone.
What Is a Time Zone Converter?
"Let's meet at 3" is an incomplete sentence across borders: 3 PM in New York is noon in Los Angeles, 8 PM in London, and 1 AM the next day in Karachi. A time zone converter removes the mental arithmetic and the calendar errors that come with it. Enter a date and time, pick the zone it is in and the zone you want, and this tool converts it — the essential utility for remote teams, international calls, flight planning, live-event viewers, and anyone with family in another country.
The date matters as much as the clock time. Because of the International Date Line, a converted time can land on the previous or following day — and because many regions shift their clocks for daylight saving time on dates that differ by country, the offset between two cities is not constant through the year. London and New York, for instance, are five hours apart most of the year, but only four during the weeks when one has changed clocks and the other has not.
How to Use the Time Zone Converter
- Enter the date and time you want to convert.
- Select the time zone that time belongs to.
- Select the time zone to convert into.
- Click Convert and read the result — checking whether it falls on the same day, the day before, or the day after.
UTC, GMT, and Offsets
All time zones are described as offsets from Coordinated Universal Time (UTC) — New York standard time is UTC−5, India is UTC+5:30, Tokyo is UTC+9. GMT (Greenwich Mean Time) is the older name for essentially the same reference and survives in casual use, while UTC is the technical standard modern systems use. Half-hour and even 45-minute offsets exist (Nepal is UTC+5:45), and around 40 distinct offsets are in use worldwide — one reason converters beat memory. When scheduling in writing, including the zone name or offset ("3 PM ET / 12 PM PT") is the habit that prevents the classic missed-meeting email chain.
Tips for Cross-Zone Scheduling
- Convert the actual date of the meeting, never a generic "today" — daylight saving transitions make last month's offset wrong for next month's call.
- For recurring international meetings, re-check the time after each DST change in any participating country; the US, EU, and southern hemisphere all switch on different schedules.
- When sending an invitation, state the time in the recipient's zone (converted here) and your own — belt and suspenders against one of you misreading.
Why did my converted time land on a different day?
Because the earth is round and the date line has to go somewhere. Converting an evening time in the Americas eastward to Asia adds enough hours to cross midnight; converting a morning time in Asia westward to the Americas can land on the previous afternoon. Always carry the date along with the time when you share a converted result — "Tuesday, 9 AM your time" is the complete message.
Does this converter handle daylight saving time?
Yes — conversions use the standard time zone rules for the specific date you enter, so a July date between London and New York uses their summer offsets, and a January date uses winter offsets. This is exactly why entering the true date matters: the same pair of cities converts differently at different times of year, particularly in the transition weeks.
What is the difference between UTC and GMT?
For everyday purposes, nothing — they coincide to within a second. Technically, GMT is an astronomical time scale based on Earth's rotation, while UTC is an atomic-clock standard adjusted with occasional leap seconds to stay near GMT. Aviation, computing, and science standardized on UTC; GMT persists in UK winter time and casual speech.
How many time zones are there?
There are 24 hours in a day but roughly 38–40 UTC offsets in actual use, because countries choose their own: some use half-hour or 45-minute offsets, large countries span what "should" be several zones, and China famously uses a single zone across five geographical ones. The official IANA time zone database tracks several hundred named zones once regional and historical variations are counted.