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Closing the Book on Homework: Enhancing Public Education and Freeing Family Time by John Buell (2004) The Battle Over Homework: Common Ground for Administrators, Teachers, and Parents by Harris Cooper Archived 2012-07-23 at the Wayback Machine (2007) The Homework Myth: Why Our Kids Get Too Much of a Bad Thing by Alfie Kohn (2006)
The basic approach of nearly all of the methods to calculate the day of the week begins by starting from an "anchor date": a known pair (such as 1 January 1800 as a Wednesday), determining the number of days between the known day and the day that you are trying to determine, and using arithmetic modulo 7 to find a new numerical day of the week.
Retrieved from "https://en.wikipedia.org/w/index.php?title=Calculating_the_day_of_the_week&oldid=473328703"
Zeller's congruence is an algorithm devised by Christian Zeller in the 19th century to calculate the day of the week for any Julian or Gregorian calendar date. It can be considered to be based on the conversion between Julian day and the calendar date.
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The day of the week can be easily calculated given a date's Julian day number (JD, i.e. the integer value at noon UT): Adding one to the remainder after dividing the Julian day number by seven (JD modulo 7 + 1) yields that date's ISO 8601 day of the week. For example, the Julian day number of 22 February 2025 is 2460729.
By default the current day is highlighted. To highlight (an)other day(s) use cw and cdow. cw gives the week and cdow the day of the week to be highlighted. Together they determine a specific day to be highlighted. cw alone will highlight the whole week. cdow alone will highlight the given week day for the whole month.
Instead, they record the date or time that the page was most recently edited or purged. If you want a clock that constantly updates, then go to Special:Preferences#mw-prefsection-gadgets and enable the Appearance item, "Add a clock to the personal toolbar that displays the current time in UTC and provides a link to purge the current page".