Time Zone Converter & Meeting Planner
See one moment in every city at once. Pick a time, add the places your team works from, and instantly spot who is in office hours and who would be fast asleep. Daylight saving is handled for you.
Green = 9am–6pm working hours · Amber = early or late · Red = overnight
How to Plan a Meeting Across Time Zones
- Set the date and time you have in mind, and the zone you are thinking in — usually your own.
- Add every city your attendees are in using the Add a place box.
- Read the colours: green means comfortably inside working hours, amber is early or late, red means the middle of the night.
- Nudge the time until as many rows as possible are green, then copy the list straight into your invite.
Why Time Zones Are So Easy to Get Wrong
Offsets are not fixed. A city that is 5 hours behind you in January might be 4 hours behind in July, because the two countries start and end daylight saving on different dates. Between mid-March and early April, for instance, the gap between London and New York changes twice.
This converter uses the IANA time zone database built into your browser, which knows the real daylight saving rules for every zone on any given date. That is why you pick a city rather than an offset — picking “UTC+2” would be wrong for half the year.
Tips for Distributed Teams
- Always write the zone in invites: “3pm UK time” is clear, “3pm” is not.
- Rotate awkward slots so the same region is not always taking the early call.
- Watch the date line. A Friday afternoon call in London is already Saturday morning in Auckland — rows here flag the day difference.
- Avoid the DST changeover weeks for anything critical; that is when recurring meetings silently drift by an hour.
UTC, GMT and Local Time
UTC is the global reference that never changes for daylight saving, which is why servers, aviation and logs use it. GMT is effectively the same reading, but it is also the winter time zone of the UK — London is GMT in January and BST (UTC+1) in July. If you mean the fixed reference, say UTC.
Frequently Asked Questions
Does it handle daylight saving time?
Yes. Conversions use your browser’s IANA time zone data, so each city is converted with the rules that actually apply on the date you chose, not a fixed offset.
Is my data sent anywhere?
No. Every conversion happens in your browser. Nothing about your meeting, your list of cities or your location is uploaded.
Why does a row show +1 day?
Because that city has already crossed midnight into the next calendar day. It is the most common source of scheduling mistakes, so it is flagged clearly.
Can I plan a date in the future?
Yes, and you should. Pick the actual meeting date rather than today, because a future date may fall on the other side of a daylight saving change.