Convert times between cities, keep a world-clock board, find meeting
windows — all offline, DST handled by your browser’s own timezone database.
Patterns: time [in] city [on date]
[to city, city and city] · now in city ·
dates as 7 Aug 2026, 2026-08-07, today, tomorrow ·
disambiguate with a region: london on, cambridge ma, sydney ns
Try
Cities
Day dial
Rim numbers: hours of the home day (midnight at the top).
One ring per city, aligned so any radius is the same instant everywhere;
small numerals are each city’s own 0/6/12/18 local. Thick arc =
working hours, thin = night. Drag the hand — the board and the
meeting window follow.