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For determination of the day of the week (1 January 2000, Saturday) the day of the month: 1 ~ 31 (1) the month: (6) the year: (0) the century mod 4 for the Gregorian calendar and mod 7 for the Julian calendar (0). adding 1+6+0+0=7. Dividing by 7 leaves a remainder of 0, so the day of the week is Saturday. The formula is w = (d + m + y + c) mod 7.
Suppose that we want to find the day of week that the American Civil War broke out at Fort Sumter, which was April 12, 1861. The anchor day for the century was 94 days after Tuesday, or, in other words, Friday (calculated as 18 × 5 + ⌊ 18 / 4 ⌋; or just look at the chart, above, which lists the century's anchor days). The digits 61 ...
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.
January 11 February 12 March 1 April 2 May 3 June 4 July 5 August 6 September 7 October 8 November 9 December 10. The algorithm enables a computer to print calendar and diary pages for past or future sequences of any desired length from the reform of the calendar, which in England was 3/14 September 1752.
Pi Day 2024 is upon us which means it is time to break out the math problems and take advantage of Pi Day deals. Pi Day 2024: A quick math refresher and some ways that you can celebrate this 3.14 ...
Retrieved from "https://en.wikipedia.org/w/index.php?title=Calculating_the_day_of_the_week&oldid=473328703"
1939 – Elizabeth Ashley, American actress [30] 1939 – John Peel, English radio host and producer (d. 2004) 1940 – Jack Biondolillo, American bowler (d. 2021) [31] 1941 – Ignazio Giunti, Italian race car driver (d. 1971) 1941 – Ben Jones, American actor and politician [30] 1941 – Sue MacGregor, English journalist and radio host
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