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= Hack #43: Calculate Any Weekday = Quickly calculate the day of the week for any date of the Gregorian calendar \x96 useful for scheduling appointments and meetings! == Additions and Suggestions == Concrete ideas to modify and expand this hack go here. == Discussion == Freeform discussion of this hack goes here. == Links == * Lewis Carroll's algorithm: http://www.cs.usyd.edu.au/~kev/pp/TUTORIALS/1b/carroll.html * CalendarFeat page on Mentat Wiki * The World Calendar: http://personal.ecu.edu/mccartyr/world-calendar.html == Errata == Page 167 Line 6 erase 'divide the century by 4,' Line 7 replace 'sevens' by 'fours' The example should be.. Thus: 20 mod 4 equals 0 3 - 0 equals 3 2 times 3 equals 6 == Hack Author == ["Ron Hale-Evans"] == Return to Main Book Page == This is a page for a hack from the book MindPerformanceHacks by ["Ron Hale-Evans"].
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