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
Easter Monday Liturgy; while this is prescribed for all days of that week, often they are only celebrated on Monday and maybe a couple of other days in parish churches, especially in non-Orthodox countries. Also, when the calendar date of the feast day of a major saint, "e.g.", St. George or the patron saint of a church or one's name day, falls during Holy Week or on Easter Sunday, the saint's day is celebrated on Easter Monday. Easter Monday is an official holiday in the following countries. Nations on this list indicated as "Eastern Christian" observe Easter according to the Julian Calendar