Week
In conjunction with the system of months there is a system of weeks. A physical or electronic calendar provides conversion from a given date to the weekday, and shows multiple dates for a given weekday and month. Calculating the day of the week is not very simple, because of the irregularities in the Gregorian system. When the Gregorian calendar was adopted by each country (but not Alaska), the weekly cycle continued uninterrupted. For example, in the case of the few countries that adopted the reformed calendar on the date proposed by Gregory XIII for the calendar's adoption, Friday, 15 October 1582, the preceding date was Thursday, 4 October 1582 (Julian calendar).
Opinions vary about the numbering of the days of the week. ISO 8601, in common use worldwide, starts with Monday=1; printed monthly calendar grids list Mondays in the first (left) column of dates and Sundays in the last. Software often starts with Sunday=0. In the United States, it's generally the case that Sunday=1, with Sundays shown in the left column of a monthly calendar page.
Read more about this topic: Gregorian Calendar
Famous quotes containing the word week:
“A woman would be wise to think it well
If once a week you only rang the bell.”
—Gwendolyn Brooks (b. 1917)
“A week is a long time in politics.”
—Harold Wilson, Lord Riveaulx (1916–1995)
“I prefer surveying for a week to spending a week in fashionable society even of the best class.”
—Ellen Henrietta Swallow Richards (1842–1911)