Live world clock and time-zone tools

Oprus is a world clock for people who work across time zones. It shows the current time in any city, tracks daylight saving shifts as they take effect, and lays out a full day so overlapping hours are visible at a glance. The GRID compares cities on a single timeline. City pages carry local time, sunrise and sunset, public holidays, and the architecture that defines the place. Compare pages set two cities side by side with the difference between them and the working hours they share. The Clock Wall keeps a set of cities on one screen. Time is read from the IANA time zone database, so daylight saving changes land on the day they happen. Any setup can be shared as a link that opens in the same state.