<Tr> <Td> 2020 </Td> <Td> 29 March </Td> <Td> 25 October </Td> </Tr> <Tr> <Td> 2021 </Td> <Td> 28 March </Td> <Td> 31 October </Td> </Tr> <Tr> <Td> 2022 </Td> <Td> 27 March </Td> <Td> 30 October </Td> </Tr> <P> Before 1880, the legal time at any place in the United Kingdom of Great Britain and Ireland was defined as local mean time, as held by the appeal in the 1858 court case Curtis v. March . The Statutes (Definition of Time) Act, 1880 defined Dublin Mean Time as the legal time for Ireland . This was the local mean time at Dunsink Observatory outside Dublin, and was about 25 minutes 21 seconds behind Greenwich Mean Time (GMT), which was defined by the same act to be the legal time for Great Britain . After the Easter Rising, the time difference between Ireland and Britain was found inconvenient for telegraphic communication and the Time (Ireland) Act, 1916 provided that Irish time would be the same as British time, from 2: 00 am Dublin Mean Time on Sunday 1 October 1916 . Summer time (daylight saving time) had been introduced in May 1916 across the United Kingdom as a temporary efficiency measure for the First World War, and the changeover from Dublin time to Greenwich time was simultaneous with the changeover from summer time to winter time . John Dillon opposed the first reading of the Time (Ireland) Bill for having been introduced without consultation of the Irish Parliamentary Party; he said the different time in Ireland "reminds us that we are coming into a strange country". T.M. Healy opposed the second reading on the basis that "while the Daylight Saving Bill added to the length of your daylight, this Bill adds to the length of your darkness". </P>

Is ireland in a different time zone to the uk