Time differences between cities

The usual time difference between the pairs of cities people look up most, the weeks of the year it is something else, and the clock rules for all 46 cities behind them.

The number every converter leaves out

The difference between two cities is usually quoted as one number, and for most pairs it is one number for most of the year. It is not one number all year. The European Union changes its clocks on the last Sunday in March and the United States on the second Sunday, so for the fortnight between them London and New York are four hours apart rather than five — and a standing call moves by an hour with nobody touching it. The table below gives those weeks for every pair on it.

The pairs people look up most

29 pairs, each with the gap for most of the year and every other gap the clock changes produce. The second column is the answer most converters give; the third is the part they leave out.

Every city, and when its clocks change

For a pair not listed above, take the two offsets from this table. Add an hour to a city's offset while it is on summer time.

The Americas and the Pacific

Europe and Africa

The Middle East and South Asia

East Asia and Oceania

Time differences between countries · Time zones by abbreviation · Cron schedules

See also

• Capacitor Code Chart — Every 3-Digit Code in pF, nF and µF