How do I read the timezone clock?

The dial is one full day: midnight at the bottom, noon at the top, the 24 hours around the edge. Each hand is a city, pointing at that city's current local hour. Hands in the shaded part of the dial are in sleeping hours (22:00 to 6:00 local), hands inside the ring are in working hours (9:00 to 17:00). Your own zone is the coloured hand.

Why a 24-hour dial instead of a normal clock?

A 12-hour clock goes round twice a day, so two cities 12 hours apart would show the same hand. On a 24-hour dial every hour of the day has its own place, so all your cities fit on one face and the gaps between them are the time differences.

How do I plan a meeting with it?

Scroll over the dial, drag the slider or use the arrow keys to move every hand forward or back together, and watch for the moment when all the hands you care about sit inside the working ring. Then open the meeting planner for the exact overlap, or share a Cal.com booking link so each person picks a time in their own zone.

Does it keep my cities?

Yes, in your browser, and in the page's address: copy the URL to share your clock with someone else, or to open it on another device.

Timezone clock

Every time zone on one 24-hour dial. A hand per city points at its local hour, the shaded half is night and the ring is working hours, so you see who is at work, awake or asleep in one look.

Working hoursSleeping hours

Now

Scroll over the dial or drag the slider to plan ahead. Every hand moves together.

New YorkTue, Oct 27 · EDT · UTC−4 · asleep1:55 AM
LondonTue, Oct 27 · GMT · UTC+0 · asleep5:55 AM
BerlinTue, Oct 27 · CET · UTC+1 · awake6:55 AM
MumbaiTue, Oct 27 · IST · UTC+5:30 · working11:25 AM
SingaporeTue, Oct 27 · SGT · UTC+8 · working1:55 PM
TokyoTue, Oct 27 · JST · UTC+9 · working2:55 PM
SydneyTue, Oct 27 · AEDT · UTC+11 · working4:55 PM

Working hours 9:00–17:00, sleeping hours 22:00–6:00, local to each city.

How to read it

The face is one day. Midnight is at the bottom, noon at the top, and the hours run clockwise around the edge, like the sun through a day. Each hand is a city and points at that city's local time right now. Two hands close together are in nearly the same zone; hands on opposite sides are twelve hours apart.

The shaded part of the dial is sleeping hours, 22:00 to 6:00 local. The ring inside the edge is working hours, 9:00 to 17:00. A hand in the ring is at work, a hand in the shade is asleep. Scroll over the dial or drag the slider to move every hand through the day together and find the hours when your whole team is in the ring.

More tools

Find the exact overlap with the meeting planner

Timezone clock

How to read it

More tools

Frequently asked questions