How To Calculate The Day Of The Week |
Century number 16 = 0 17 = 5 18 = 3 19 = 1 20 = 0 21 = 5
Month number 144025036146 JFMAMJJASOND
1234560 - Day of week number (the remainder when divided by 7 ) SSMTWTF - Day of week
Formula: ( Month number + day + Century number + year + year / 4 ) mod 7 => day of week number | | | v v v 144025036146 16 = 0 1234560 JFMAMJJASOND 17 = 5 SSMTWTF 18 = 3 19 = 1 20 = 0
July 28 19 90 1/4 of 90 ( 0 + 28 + 1 + 90 + 22 ) mod 7 = ( 141 ) mod 7 = 1 (Sat)
May 27 20 15 1/4 of 15 ( 2 + 27 + 0 + 15 + 3 ) mod 7 = 5 (Wed)
May 8 20 15 1/4 of 15 ( 2 + 8 + 0 + 15 + 3 ) mod 7 = 0 (Fri)
Sep 18 20 16 1/4th of 16 ( 6 + 18 + 0 + 16 + 4 ) mod 7 = 2 (Sunday)
Jan 31 18 83 ( 1 + 31 + 3 + 83 + 20 ) mod 7 = 138 mod 7 = 5 (Wed)