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Summer Time Is Daylight Saving Time

Saying “summer time” instead of Daylight Saving Time (DST) is common in many countries, especially in the United Kingdom.

Closeup shot of the Elizabeth tower housing the Big Ben bell in London

Brits often call DST “summer time”.


British Summer Time (BST) is the period in which DST is observed in the United Kingdom. The term or winter time is sometimes used instead of standard time, which is the official name for the period without DST.

The term “summer time” can be found in various bills about DST in the United Kingdom, including the Summer Time Acts of 1916, 1925, and 1972.

German: Sommerzeit

Many other countries also refer to DST as summer time. In Germany, which was one of the first countries to use DST, it is called Sommerzeit. In Scandinavian countries, DST is referred to as sommertid.

War Time

DST was referred to as War Time in the USA during World War II. It was also known as Central War Time, Eastern War Time, Mountain War Time, and Pacific War Time, depending on the time zone in the United States. After World War II, it was referred to as Eastern Peace Time.

In wartime Great Britain, it was known as British Double Summer Time during the summer months and British Summer Time during the winter months.

Berlin Time

DST was also known as Hitler Time in some parts of Europe, as well as Berlin Time and Sommerzeit, during World War II. After the war, DST had other references, including Summer Time Daylight Saving.

Topics: Daylight Saving Time, Timekeeping