Reign of William I

This is a version in which regnal years begin at the date of accession. See alternative table, based on date of coronation.
Regnal yearEaster Sunday 
1 William I
14 October 1066
-13 October 1067		 8 April 1067  October November December January February March April May June July August September October
2 William I
14 October 1067
-13 October 1068		 23 March 1068  October November December January February March April May June July August September October
3 William I
14 October 1068
-13 October 1069		 12 April 1069  October November December January February March April May June July August September October
4 William I
14 October 1069
-13 October 1070		 4 April 1070  October November December January February March April May June July August September October
5 William I
14 October 1070
-13 October 1071		 24 April 1071  October November December January February March April May June July August September October
6 William I
14 October 1071
-13 October 1072		 8 April 1072  October November December January February March April May June July August September October
7 William I
14 October 1072
-13 October 1073		 31 March 1073  October November December January February March April May June July August September October
8 William I
14 October 1073
-13 October 1074		 20 April 1074  October November December January February March April May June July August September October
9 William I
14 October 1074
-13 October 1075		 5 April 1075  October November December January February March April May June July August September October
10 William I
14 October 1075
-13 October 1076		 27 March 1076  October November December January February March April May June July August September October
11 William I
14 October 1076
-13 October 1077		 16 April 1077  October November December January February March April May June July August September October
12 William I
14 October 1077
-13 October 1078		 8 April 1078  October November December January February March April May June July August September October
13 William I
14 October 1078
-13 October 1079		 24 March 1079  October November December January February March April May June July August September October
14 William I
14 October 1079
-13 October 1080		 12 April 1080  October November December January February March April May June July August September October
15 William I
14 October 1080
-13 October 1081		 4 April 1081  October November December January February March April May June July August September October
16 William I
14 October 1081
-13 October 1082		 24 April 1082  October November December January February March April May June July August September October
17 William I
14 October 1082
-13 October 1083		 9 April 1083  October November December January February March April May June July August September October
18 William I
14 October 1083
-13 October 1084		 31 March 1084  October November December January February March April May June July August September October
19 William I
14 October 1084
-13 October 1085		 20 April 1085  October November December January February March April May June July August September October
20 William I
14 October 1085
-13 October 1086		 5 April 1086  October November December January February March April May June July August September October
21 William I
14 October 1086
-9 September 1087		 28 March 1087  October November December January February March April May June July August September