Determination of the day of the week for the following month. The item for January is "0"; for February or March, "3"; for December, "12". Day-item: The total, thus reached, must be corrected, by deducting "1" (first adding 7, if the total be "0"), if the date be January or February in a leap year, remembering that every year, divisible by 4, is a Leap Year, excepting only the century-years, in `New Style', when the number of centuries is not so divisible (e.g. 1800). The final result gives the day of the week, "0" meaning Sunday, "1" Monday, and so on. Examples: 17, divided by 4, leaves
Liturgical year of the following Saturday. In the Roman Rite, the Easter octave allows no other feasts to be celebrated or commemorated during it; a solemnity, such as the Annunciation, falling within it is transferred to the following Monday. If Easter Sunday or Easter Monday falls on 25 April, the Greater Litanies, which in the pre-1970 form of the Roman Rite are on that day, are transferred to the following Tuesday. By a decree of May 5, 2000, the Second Sunday of Easter (the Sunday after Easter Day itself), is known also in the Roman Rite as the Feast of the Divine