World Clock

What is a world clock?

A world clock shows the current local time in several cities at once, so you can see at a glance whether it's a reasonable hour to call someone, schedule a meeting, or wait for a market to open. Each row updates every second and reflects the city's current offset from UTC, including any daylight-saving rules that apply on the date shown.

How to use it

Pick a city from the dropdown to add it to the list. Drag any row by its handle (the dotted icon on the left) to reorder. Click the × on any row to remove it, or use the format toggle to switch between 12 and 24-hour display. Your row order, the cities you've added, and the time format are stored on this device, so the list looks the same the next time you open the page.

Tips for scheduling across zones

Put the participants who joined first or whose calendar is the constraint at the top of the list — your eye will naturally use that row as the anchor. When working with someone on the opposite side of the planet, look for the small overlap window where it's still daytime in both places (typically 1–3 hours). Watch out for daylight-saving transitions: the U.S., the EU and the southern hemisphere don't shift on the same dates, so a steady weekly call can drift by an hour twice a year.

Common time zone offsets

UTC is the global reference. UTC−8 / −7 covers the U.S. west coast (PST/PDT). UTC−5 / −4 covers New York (EST/EDT). UTC+0 / +1 is London (GMT/BST). UTC+1 / +2 covers most of continental Europe (CET/CEST). UTC+9 is Tokyo, no DST. UTC+10 / +11 is Sydney (AEST/AEDT). Offsets shown next to each city are computed live for the current date, so they always reflect daylight-saving correctly.

Frequently asked questions