Names of the days of the week is followed by a number indicating the day: "Monday" is literally "star day one", "Tuesday" is "star day two", etc. The exception is Sunday, where rì (日), meaning "sun" or "day", is used instead of a number. In Swahili, the day begins at sunrise, unlike in the Arabic and Hebrew calendars where the day starts at sunset (therefore an offset of twelve hours), and unlike in the Western world where the day starts at midnight (therefore an offset of six hours). Saturday is therefore the first day of the week, as it is the day that includes the first night
Determination of the day of the week example, that January 1995 is to be treated as month 13 of 1994. The formula for the Gregorian calendar is where The only difference is one between Zeller’s algorithm () and the Gaussian algorithm (), that is . So we can get the values of months from those for the Gaussian algorithm by adding one: In a partly tabular method by Schwerdtfeger, the year is split into the century and the two digit year within the century. The approach depends on the month. For , so is between 0 and 99. For , The formula for the day of the