| UTC−00:25:21 | |
|---|---|
| Time zone | |
 | |
| UTC offset | |
| UTC | UTC−00:25:21 |
| Current time | |
| 09:53, 26 November 2025UTC−00:25:21[refresh] | |
UTC−00:25:21 is an identifier for atime offset from UTC of −00:25:21, i.e. twenty-five minutes and twenty-one seconds behindGreenwich Mean Time. This time, known asDublin Mean Time, islocal mean time atDunsink Observatory and was official time inIreland between 1880 and 1916.
Dublin Mean Time was introduced by the Statutes (Definition of Time) Act, 1880,[1] which also definedGreenwich Mean Time (GMT) as legal time inGreat Britain. This act replaced local mean time, which had been the legal time sinceCurtis v. March in 1858, throughout theUnited Kingdom of Great Britain and Ireland.
From 3:00DST on 1 October 1916, theTime (Ireland) Act, 1916[2] changed the time used inIreland to be the same as that used inGreat Britain, both during and outsidedaylight saving time.
