Convert time between any two time zones instantly. See world clocks at a glance.
Time zone conversion seems like simple addition or subtraction until daylight saving time enters the picture - two locations that are normally 3 hours apart can temporarily be 2 or 4 hours apart during the weeks when one region has shifted its clocks and the other hasn't yet, or won't at all (not every country observes daylight saving time). This is exactly why scheduling an international call "3 hours ahead" using last month's offset can quietly be wrong by an hour without anyone noticing until someone shows up at the wrong time.
Remote teams working across multiple time zones deal with this constantly when scheduling meetings, and international travelers use time zone converters to figure out reasonable times to call family back home without waking anyone up in the middle of the night.
Not every time zone is offset by a clean whole number of hours from UTC - India (UTC+5:30) and Nepal (UTC+5:45) are well-known examples of half-hour and quarter-hour offsets, which adds another layer of complexity that a manual mental calculation is especially prone to getting wrong.
Time zone conversion is complicated by more than just simple hour offsets. Many countries observe daylight saving time, but not all, and the dates they switch clocks forward or back don't always align between countries — the US and Europe, for example, change their clocks on different weekends, creating a temporary one-hour discrepancy in the calculated offset between them for a week or two each spring and fall. Some regions also use unusual offsets like 30 or 45 minutes rather than a full hour, such as India (UTC+5:30) and Nepal (UTC+5:45), which don't fit the simple whole-hour mental math most people default to.
This matters enormously for scheduling international meetings, coordinating remote teams, and planning travel. A meeting scheduled for "3 PM" without a specified time zone is genuinely ambiguous once more than one location is involved, and miscalculating a time zone difference is one of the most common causes of missed international calls and video meetings.
Coordinated Universal Time (UTC) serves as the reference point that all time zones are defined relative to, which is why technical systems, flight schedules, and international broadcasts often display times in UTC rather than a local zone — it removes ambiguity entirely. When coordinating across time zones for something important, converting everyone's local time to UTC first, then back to each person's local zone, is the most reliable way to avoid an off-by-one-hour scheduling mistake.
Teams distributed across very different time zones often need to identify a small overlapping window of standard working hours, which can shrink to just an hour or two, or disappear entirely, for teams spread across regions more than 10-12 hours apart. Understanding exact time zone offsets, including how they shift with daylight saving, is essential for scheduling meetings that actually fall within reasonable working hours for every participant.
A handful of regions use offsets that don't align to the hour at all — Nepal's UTC+5:45 is the most extreme common example, chosen historically to center the zone on a specific meridian rather than rounding to the nearest hour. These non-standard offsets are a frequent source of scheduling errors for anyone unfamiliar with them, making a reliable converter more useful than manual estimation for any of these regions.
Yes! The converter uses your browser's built-in timezone data which automatically accounts for DST changes.
All major world time zones are supported, covering every country and region.
Yes, time zone offsets shift during daylight saving periods in regions that observe it, and this is factored into accurate conversions.
Some regions, like India (UTC+5:30) and Nepal (UTC+5:45), use half-hour or quarter-hour offsets rather than whole-hour offsets from UTC.
No, many countries and regions don't observe daylight saving time at all, which is exactly why manual time zone math can become wrong during transition periods.
