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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.
The number of days between two dates, which is simply the difference in their Julian day numbers. The dates of moveable holidays, like Christian Easter (the calculation is known as Computus ) followed up by Ascension Thursday and Pentecost or Advent Sundays, or the Jewish Passover , for a given year.
A simple flowchart showing the Odd+11 method to calculate the anchor day. A simpler method for finding the year's anchor day was discovered in 2010 by Chamberlain Fong and Michael K. Walters, [12] and described in their paper submitted to the 7th International Congress on Industrial and Applied Mathematics (2011).
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The Julian day is a continuous count of days from the ... 0:00 November 17, 1858 JD − 2400000.5 ... to calculate the lunar ephemerides in the new American Ephemeris ...
A mean solar day (what we normally measure as a "day") is the average time between local solar noons ("average" since this varies slightly over a year). Earth makes one rotation around its axis each sidereal day; during that time it moves a short distance (about 1°) along its orbit around the Sun.
How many days Social Security will last a married couple each month: 16.17 Total monthly cost of living for a couple (after Social Security benefits): $2,451 Total daily cost of living for a ...
Can we imagine ourselves back on that awful day in the summer of 2010, in the hot firefight that went on for nine hours? Men frenzied with exhaustion and reckless exuberance, eyes and throats burning from dust and smoke, in a battle that erupted after Taliban insurgents castrated a young boy in the village, knowing his family would summon nearby Marines for help and the Marines would come ...