Reign of William I

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