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| | The date of Easter; epacts (from calendar) -- Encyclopædia Britannica (Site not responding. Last check: 2007-11-07) |
 | | The seven letters A through G are each assigned to a day, consecutively from January 1 so that January 1 appears as A, January 2 as B, to January 7 which appears as G, the cycle then continuing with January 8 as A, January 9 as B, and so on. |
 | | No dominical letter is placed against the intercalary day, February 29, but, since it is still counted as a weekday and given a name, the series of letters moves back one day every leap year after intercalation. |
 | | Thus, a leap year beginning with the dominical letter C will change to a year with the dominical letter B on March 1; and in lists of dominical letters, all leap years are given a double letter notation, in the example just quoted, CB. |
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