1# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 2# Summer Time Act, 1916 3Rule GB-Eire 1916 only - May 21 2:00s 1:00 BST 4Rule GB-Eire 1916 only - Oct 1 2:00s 0 GMT 5# S.R.&O. 1917, No. 358 6Rule GB-Eire 1917 only - Apr 8 2:00s 1:00 BST 7Rule GB-Eire 1917 only - Sep 17 2:00s 0 GMT 8# S.R.&O. 1918, No. 274 9Rule GB-Eire 1918 only - Mar 24 2:00s 1:00 BST 10Rule GB-Eire 1918 only - Sep 30 2:00s 0 GMT 11# S.R.&O. 1919, No. 297 12Rule GB-Eire 1919 only - Mar 30 2:00s 1:00 BST 13Rule GB-Eire 1919 only - Sep 29 2:00s 0 GMT 14# S.R.&O. 1920, No. 458 15Rule GB-Eire 1920 only - Mar 28 2:00s 1:00 BST 16# S.R.&O. 1920, No. 1844 17Rule GB-Eire 1920 only - Oct 25 2:00s 0 GMT 18# S.R.&O. 1921, No. 363 19Rule GB-Eire 1921 only - Apr 3 2:00s 1:00 BST 20Rule GB-Eire 1921 only - Oct 3 2:00s 0 GMT 21# S.R.&O. 1922, No. 264 22Rule GB-Eire 1922 only - Mar 26 2:00s 1:00 BST 23Rule GB-Eire 1922 only - Oct 8 2:00s 0 GMT 24# The Summer Time Act, 1922 25Rule GB-Eire 1923 only - Apr Sun>=16 2:00s 1:00 BST 26Rule GB-Eire 1923 1924 - Sep Sun>=16 2:00s 0 GMT 27Rule GB-Eire 1924 only - Apr Sun>=9 2:00s 1:00 BST 28Rule GB-Eire 1925 1926 - Apr Sun>=16 2:00s 1:00 BST 29# The Summer Time Act, 1925 30Rule GB-Eire 1925 1938 - Oct Sun>=2 2:00s 0 GMT 31Rule GB-Eire 1927 only - Apr Sun>=9 2:00s 1:00 BST 32Rule GB-Eire 1928 1929 - Apr Sun>=16 2:00s 1:00 BST 33Rule GB-Eire 1930 only - Apr Sun>=9 2:00s 1:00 BST 34Rule GB-Eire 1931 1932 - Apr Sun>=16 2:00s 1:00 BST 35Rule GB-Eire 1933 only - Apr Sun>=9 2:00s 1:00 BST 36Rule GB-Eire 1934 only - Apr Sun>=16 2:00s 1:00 BST 37Rule GB-Eire 1935 only - Apr Sun>=9 2:00s 1:00 BST 38Rule GB-Eire 1936 1937 - Apr Sun>=16 2:00s 1:00 BST 39Rule GB-Eire 1938 only - Apr Sun>=9 2:00s 1:00 BST 40Rule GB-Eire 1939 only - Apr Sun>=16 2:00s 1:00 BST 41# S.R.&O. 1939, No. 1379 42Rule GB-Eire 1939 only - Nov Sun>=16 2:00s 0 GMT 43# S.R.&O. 1940, No. 172 and No. 1883 44Rule GB-Eire 1940 only - Feb Sun>=23 2:00s 1:00 BST 45# S.R.&O. 1941, No. 476 46Rule GB-Eire 1941 only - May Sun>=2 1:00s 2:00 BDST 47Rule GB-Eire 1941 1943 - Aug Sun>=9 1:00s 1:00 BST 48# S.R.&O. 1942, No. 506 49Rule GB-Eire 1942 1944 - Apr Sun>=2 1:00s 2:00 BDST 50# S.R.&O. 1944, No. 932 51Rule GB-Eire 1944 only - Sep Sun>=16 1:00s 1:00 BST 52# S.R.&O. 1945, No. 312 53Rule GB-Eire 1945 only - Apr Mon>=2 1:00s 2:00 BDST 54Rule GB-Eire 1945 only - Jul Sun>=9 1:00s 1:00 BST 55# S.R.&O. 1945, No. 1208 56Rule GB-Eire 1945 1946 - Oct Sun>=2 2:00s 0 GMT 57Rule GB-Eire 1946 only - Apr Sun>=9 2:00s 1:00 BST 58# The Summer Time Act, 1947 59Rule GB-Eire 1947 only - Mar 16 2:00s 1:00 BST 60Rule GB-Eire 1947 only - Apr 13 1:00s 2:00 BDST 61Rule GB-Eire 1947 only - Aug 10 1:00s 1:00 BST 62Rule GB-Eire 1947 only - Nov 2 2:00s 0 GMT 63# Summer Time Order, 1948 (S.I. 1948/495) 64Rule GB-Eire 1948 only - Mar 14 2:00s 1:00 BST 65Rule GB-Eire 1948 only - Oct 31 2:00s 0 GMT 66# Summer Time Order, 1949 (S.I. 1949/373) 67Rule GB-Eire 1949 only - Apr 3 2:00s 1:00 BST 68Rule GB-Eire 1949 only - Oct 30 2:00s 0 GMT 69# Summer Time Order, 1950 (S.I. 1950/518) 70# Summer Time Order, 1951 (S.I. 1951/430) 71# Summer Time Order, 1952 (S.I. 1952/451) 72Rule GB-Eire 1950 1952 - Apr Sun>=14 2:00s 1:00 BST 73Rule GB-Eire 1950 1952 - Oct Sun>=21 2:00s 0 GMT 74# revert to the rules of the Summer Time Act, 1925 75Rule GB-Eire 1953 only - Apr Sun>=16 2:00s 1:00 BST 76Rule GB-Eire 1953 1960 - Oct Sun>=2 2:00s 0 GMT 77Rule GB-Eire 1954 only - Apr Sun>=9 2:00s 1:00 BST 78Rule GB-Eire 1955 1956 - Apr Sun>=16 2:00s 1:00 BST 79Rule GB-Eire 1957 only - Apr Sun>=9 2:00s 1:00 BST 80Rule GB-Eire 1958 1959 - Apr Sun>=16 2:00s 1:00 BST 81Rule GB-Eire 1960 only - Apr Sun>=9 2:00s 1:00 BST 82# Summer Time Order, 1961 (S.I. 1961/71) 83# Summer Time (1962) Order, 1961 (S.I. 1961/2465) 84# Summer Time Order, 1963 (S.I. 1963/81) 85Rule GB-Eire 1961 1963 - Mar lastSun 2:00s 1:00 BST 86Rule GB-Eire 1961 1968 - Oct Sun>=23 2:00s 0 GMT 87# Summer Time (1964) Order, 1963 (S.I. 1963/2101) 88# Summer Time Order, 1964 (S.I. 1964/1201) 89# Summer Time Order, 1967 (S.I. 1967/1148) 90Rule GB-Eire 1964 1967 - Mar Sun>=19 2:00s 1:00 BST 91# Summer Time Order, 1968 (S.I. 1968/117) 92Rule GB-Eire 1968 only - Feb 18 2:00s 1:00 BST 93# The British Standard Time Act, 1968 94# (no summer time) 95# The Summer Time Act, 1972 96Rule GB-Eire 1972 1980 - Mar Sun>=16 2:00s 1:00 BST 97Rule GB-Eire 1972 1980 - Oct Sun>=23 2:00s 0 GMT 98# Summer Time Order, 1980 (S.I. 1980/1089) 99# Summer Time Order, 1982 (S.I. 1982/1673) 100# Summer Time Order, 1986 (S.I. 1986/223) 101# Summer Time Order, 1988 (S.I. 1988/931) 102Rule GB-Eire 1981 1995 - Mar lastSun 1:00u 1:00 BST 103Rule GB-Eire 1981 1989 - Oct Sun>=23 1:00u 0 GMT 104# Summer Time Order, 1989 (S.I. 1989/985) 105# Summer Time Order, 1992 (S.I. 1992/1729) 106# Summer Time Order 1994 (S.I. 1994/2798) 107Rule GB-Eire 1990 1995 - Oct Sun>=22 1:00u 0 GMT 108# Summer Time Order 1997 (S.I. 1997/2982) 109# See EU for rules starting in 1996. 110 111# Zone NAME GMTOFF RULES FORMAT [UNTIL] 112Zone Europe/London -0:01:15 - LMT 1847 Dec 1 0:00s 113 0:00 GB-Eire %s 1968 Oct 27 114 1:00 - BST 1971 Oct 31 2:00u 115 0:00 GB-Eire %s 1996 116 0:00 EU GMT/BST 117Link Europe/London Europe/Jersey 118Link Europe/London Europe/Guernsey 119Link Europe/London Europe/Isle_of_Man 120Zone Europe/Dublin -0:25:00 - LMT 1880 Aug 2 121 -0:25:21 - DMT 1916 May 21 2:00 122 -0:25:21 1:00 IST 1916 Oct 1 2:00s 123 0:00 GB-Eire %s 1921 Dec 6 # independence 124 0:00 GB-Eire GMT/IST 1940 Feb 25 2:00 125 0:00 1:00 IST 1946 Oct 6 2:00 126 0:00 - GMT 1947 Mar 16 2:00 127 0:00 1:00 IST 1947 Nov 2 2:00 128 0:00 - GMT 1948 Apr 18 2:00 129 0:00 GB-Eire GMT/IST 1968 Oct 27 130 1:00 - IST 1971 Oct 31 2:00u 131 0:00 GB-Eire GMT/IST 1996 132 0:00 EU GMT/IST 133 134############################################################################### 135 136# Europe 137 138# EU rules are for the European Union, previously known as the EC, EEC, 139# Common Market, etc. 140 141# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 142Rule EU 1977 1980 - Apr Sun>=1 1:00u 1:00 S 143Rule EU 1977 only - Sep lastSun 1:00u 0 - 144Rule EU 1978 only - Oct 1 1:00u 0 - 145Rule EU 1979 1995 - Sep lastSun 1:00u 0 - 146Rule EU 1981 max - Mar lastSun 1:00u 1:00 S 147Rule EU 1996 max - Oct lastSun 1:00u 0 - 148 149