Extended World Clock
Every location in one dense table: the exact time with seconds, the local date, the current UTC offset and whether the sun is up — useful for operations desks and anyone coordinating across many regions.
Reading the offsets
Offsets are shown relative to UTC and already include daylight saving where it is in effect. Two cities can share an offset in winter and differ in summer — London and Lagos are both UTC+1 in July but not in January.