dominical letter

See also common year starting on Sunday and dominical letter.

The dominical letter gives the day upon which the first Sunday of the year falls.

On the outer circle, the hand shows the corresponding dominical letter.

For leap years, the outer circle will show two dominical letters.

All the configurations can be referenced by a Dominical letter.

A simpler method suitable for finding the year's dominical letter was discovered in 2010.

For example, to find the Dominical Letter of the year 1913:

There exist patterns in the dominical letters, which are very useful for mental calculation.

For years outside the range of this table, use the fact that the dominical letters repeat exactly every 400 years.

Thereafter it was restricted to being a dominical letter in the Paschal tables.

The Dominical Letter cycles backward one position every year.

The bull refers to "the explanation of our calendar" and to a canon related to the dominical letter.

The system of nundinal letters was also adapted for the week, see dominical letter.

In leap years, the leap day may or may not have a dominical letter.

The dominical letter of a year determines the days of week in its calendar:

(p. 79) - the final calendar of Dominical letters.

This is the calendar for any common year starting on Tuesday, January 1 (dominical letter F).

For determination of the dominical letter of a year (2100 C 2199 F)

If the dominical letter is E, then Easter day is on 20 April.

(See Dominical letter for one common naming scheme for the 14 calendars.)

We are able to calculate the Dominical letter in this way (function in C), where:

The "doomsday" concept in the doomsday algorithm is mathematically related to the Dominical letter.

Sources for the determination of the epact and dominical letter are given in the section Reference books at the end of this chapter.

Thus a leap year has two Dominical Letters, the second being the letter which precedes that with which the year started.

Leap years have two dominical letters because the dominical letter changes end February.