double summer time

English

Noun

double summer time (uncountable)

1. (historical) The advancing of clocks by two hours ahead of winter time in the summer instead of the usual one hour; mainly used during World War II in the United Kingdom.

   Hyponym: British Double Summer Time

   • 1941 September, “Notes and News: Timetable Puzzles in Ireland”, in Railway Magazine, page 428:

     Double summertime in Ireland had some curious effects on timetables, seeing that in Eire the single additional hour only was worked to, whereas in Northern Ireland the full British two-hour addition was in operation.

References

• “double summer time”, in Lexico, Dictionary.com; Oxford University Press, 2019–2022.