Words

Clock change (summer time)

The day a country moves its clocks forward an hour for summer, or back for winter. Many countries never do, and some have stopped.

Where it comes from

Summer time was first used across a whole country during the First World War. In the time-zone database, Berlin’s clocks first went forward on 30 April 1916.

An example

In late March your weekly call to Delhi seems to come an hour early, because London has moved its clocks and Delhi has not.