Dominical Letters
The system of dominical letters assigns a letter from A through G to each day of the year. In a leap year, February 29, the bissextile day, does not have a distinct letter. This causes all subsequent Sundays to be associated with a different dominical letter than those in the beginning of the year, so all leap years get two dominical letters. In this system, the "dominical letter" for a year is the letter which corresponds to the Sundays of that year.
Read more about this topic: Determination Of The Day Of The Week, Useful Concepts, Corresponding Years
Famous quotes containing the word letters:
“A man who publishes his letters becomes a nudist—nothing shields him from the world’s gaze except his bare skin. A writer, writing away, can always fix himself up to make himself more presentable, but a man who has written a letter is stuck with it for all time.”
—E.B. (Elwyn Brooks)