World Flip Clock

Type in the zone box and this world flip clock searches every city-backed time zone — New York, London, Tokyo, Sydney, Kolkata or a smaller town sharing the same offset. The big flip cards switch instantly, with the date line following local rules, so daylight-saving changes appear on their own. Your own zone is auto-detected on first visit, and the country dropdown plus popular chips jump straight to the right region without typing full zone names.

Below the clock, four pin cards track your regulars at a glance with live time, GMT offset and a relative label like today or tomorrow. Remote teams keep standup cities pinned; travelers keep home plus destination to dodge 3 a.m. calls; students keep a university and a family zone. Tap any pin to promote it to the big display. Pins and your 12/24-hour choice save on this device.

Everything is computed with Intl against your system clock, so it stays right even in background tabs. Frequent flyers check the relative label first, then the offset, before answering overnight messages. Pair it with Keep screen awake for ops walls and lobby displays that run all day.