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Doomsday rule. The doomsday's anchor day calculation is effectively calculating the number of days between any given date in the base year and the same date in the current year, then taking the remainder modulo 7. When both dates come after the leap day (if any), the difference is just 365y + y / 4 (rounded down). But 365 equals 52 × 7 ...
March 0 is used in Doomsday algorithm calculations. [23] March 2 was celebrated as February 30 by Lin-Manuel Miranda and Weird Al Yankovic for the release date of Yankovic's "The Hamilton Polka". [24] In November 2010 it was discovered that a Hanshin Tigers wall calendar incorrectly included the date November 31. Fans who had bought the ...
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.
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The "doomsday" concept in the doomsday algorithm is mathematically related to the Dominical letter. Because the letter of a date equals the dominical letter of a year (DL) plus the day of the week (DW), and the letter for the doomsday is C except for the portion of leap years before February 29 in which it is D, we have:
Their music video for "Shadow of the Day" from Minutes to Midnight, represents the Doomsday Clock as an actual clock with it reaching midnight at the end of the video. In the Flobots' song "The Circle in the Square", the lyrics say "the clock is now 11:55 on the big hand", which was the Doomsday Clock's setting in 2012 when the song was released.
For the Gregorian calendar, Zeller's congruence is = (+ ⌊ (+) ⌋ + + ⌊ ⌋ + ⌊ ⌋), for the Julian calendar it is = (+ ⌊ (+) ⌋ + + ⌊ ⌋ +), where h is ...
Traversal using right-hand rule (). One effective rule for traversing mazes is the Hand On Wall Rule, also known as either the left-hand rule or the right-hand rule.If the maze is simply connected, that is, all its walls are connected together or to the maze's outer boundary, then by keeping one hand in contact with one wall of the maze the solver is guaranteed not to get lost and will reach a ...