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.
Freeform discussion of this hack goes here.
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
Return to Main Book Page
This is a page for a hack from the book MindPerformanceHacks by Ron Hale-Evans.