411 REFERENCE · Wiktionary
British Double Summer Time
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Proper noun
British Double Summer Time
en historical A variant of daylight saving time, two hours ahead of GMT, used by Britain in the summers of 1941 to 1945, during World War II.
en BDST initialism
en double summer time