World Clock
See the current time across major cities at a glance. If you work with a distributed team or have family in other time zones, this is a tab you keep open. No clutter, just the times you need.
Common UTC offsets
Every timezone is measured as an offset from Coordinated Universal Time (UTC). Here are the most widely used offsets and the cities they cover.
Offsets shift by +1 hour during daylight saving time for most of North America and Europe.
Common uses
- Distributed team standups. Check whether your colleague in Tokyo is still in their workday before sending a meeting invite.
- Remote freelance calls. Confirm the exact local time on both ends before a client call to avoid the one-hour DST misalignment mistake.
- Travel planning. Know what time you will land, what time your hotel check-in opens, and whether it is too late to call home.
- Live events and streams. Convert a UTC broadcast time (game kickoff, product launch) to your local time instantly.
- Family across borders. Keep a clock for the city where your family lives so you always know at a glance if it is a good time to call.
FAQ
Why does my coworker in London show a different offset in summer vs. winter?
The UK observes British Summer Time (BST, UTC+1) from late March to late October, then reverts to GMT (UTC+0). The US and EU also shift on different dates, so there are brief windows each year where the gap between two cities is different from the usual number.
How many time zones are there?
There are 38 distinct UTC offsets in use worldwide when you include fractional offsets like UTC+5:30 (India) and UTC+9:30 (Australia). Only 24 are whole-hour offsets.
What is the difference between GMT and UTC?
For everyday purposes they are interchangeable. GMT is a timezone (used in the UK during winter), while UTC is the international time standard that all offsets are measured against. UTC does not observe daylight saving time; GMT technically does in the form of BST.
Which country spans the most time zones?
France covers the most time zones (12) due to its overseas territories, followed by the United States (11) and Russia (11 contiguous zones). Russia spans the widest range of contiguous land area.
Can I compare specific cities side by side?
Yes. The timezone converter lets you add multiple cities and see all of them at a chosen reference time, including a 24-hour grid view to find overlap.