Time Zone Converter

Convert a time from one time zone to another, with daylight saving handled automatically for the date you pick.

How this works

Pick a date and time, then choose the zone that time belongs to and the zone you want it converted into. The calculator finds the matching moment in the target zone and shows the local time there, the date if it has shifted, and the current hour difference between the two places.

Time zone offsets are not fixed. Most zones move by an hour twice a year for daylight saving, and not every country changes on the same date, so the gap between two cities can be 5 hours in July and 6 hours in January. This tool reads the exact daylight saving rules for the date you picked, so a meeting time worked out for next month will already account for a clock change that has not happened yet.

Times that do not exist, or exist twice

On the day clocks spring forward, one clock hour is skipped entirely: in the US in 2026, for example, 2:00–2:59 AM does not happen in zones that observe daylight saving, since clocks jump straight from 2:00 AM to 3:00 AM. On the day clocks fall back, one clock hour happens twice. If you enter a time that falls in the skipped hour, this tool resolves it using the offset in effect just before the change; if you enter a time in the repeated hour, it uses the earlier of the two occurrences. Either way, picking a time an hour or so outside that window removes any doubt.

Why the gap between two cities is not always the same

The United States and Europe both use daylight saving, but they switch clocks on different weekends in spring and autumn. For roughly two to three weeks each year, the usual gap between, say, New York and London is one hour different from normal, because one side has changed its clocks and the other has not yet. Countries near the equator, including most of South Asia, Africa and Southeast Asia, do not observe daylight saving at all, so their offset from UTC never changes through the year.

Reading the offset

An offset like UTC+5 means that zone is 5 hours ahead of Coordinated Universal Time. A negative offset, like UTC−8, means that zone is behind UTC. A handful of zones sit on a half-hour or 45-minute boundary rather than a full hour, including India (UTC+5:30), Iran (UTC+3:30) and Nepal (UTC+5:45), because the offset follows a country's chosen standard time rather than the nearest whole hour of longitude.

Common questions

Yes. The conversion is calculated for the exact date you enter, using each zone's own daylight saving rules for that date. A conversion done for a date after a clock change will already reflect the new offset, which is why the hour difference between two cities can change depending on which date you pick.
Because converting a time can cross midnight in the target zone. A meeting at 11 PM in Tokyo is still the same afternoon in New York, one calendar day earlier. The result shows whether the converted time falls on the same day, the next day, or the previous day.
Coordinated Universal Time is the reference point every time zone is measured against. It does not observe daylight saving, so it stays fixed all year. It is close to, but not identical to, GMT, which is the specific time zone used in the UK during winter.
Some countries set their standard time on a half-hour or 45-minute offset rather than a full hour. India, Iran, Newfoundland in Canada, and Nepal are the most common examples. Converting between one of these zones and a whole-hour zone will always produce a fractional hour difference.
Yes. Enter the meeting time in your own zone, set the other zone to the city your contact is in, and the result shows the local time and date they will see. Because the tool reads the daylight saving rules for the specific date, it stays correct even when scheduling weeks or months ahead.

Continue with

All tools
Unix Timestamp Convert Unix time to a date, or a date to a Unix timestamp. Days From Today Add or subtract days, weeks, months or years. Work Hours Hours worked between two times, minus breaks. Business Days Working days between dates, weekends skipped. Day of Week What day of the week any date falls on, past or future.