Maundy Thursday normally celebrated in the evening, when Friday begins according to Jewish tradition, as the Last Supper was held on the feast of Passover, according to the three Synoptic Gospels. Use of the names "Maundy Thursday", "Holy Thursday", and others is not evenly distributed. What is the generally accepted name for the day varies according to geographical area and religious affiliation. Thus, although in England "Maundy Thursday" is the normal term, the term is less commonly used in Ireland, Scotland or Canada. People may use one term in a religious context and another in the context of the civil calendar of
Determination of the day of the week week is where the positive modulus is chosen. The value of is obtained from the following table: The value of is obtained from the following table, which depends on the calendar. For the Gregorian calendar, For the Julian calendar, Charles Lutwidge Dodgson (Lewis Carroll) devised a method resembling a puzzle, yet partly tabular in using the same index numbers for the months as in the "Complete table: Julian and Gregorian calendars" above. He lists the same three adjustments for the first three months of non-leap years, one 7 higher for the last, and gives cryptic instructions for finding the rest;