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webdood/Day by Date

Created May 18, 2010 21:02
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Day by Date
var day_by_date = function(y, m, d){
return (d+=m<3?y--:y-2,Math.floor(23*m/9)+d+4+Math.floor(y/4)-Math.floor(y/100)+Math.floor(y/400))%7;
};
['sun','mon','tue','wed','thu','fri','sat'][day_by_date(1987, 9, 10)]
from clindsey
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webdood commented May 18, 2010

Figures out the day of the week without using a Date object. Not sure why this is useful, but it's cool that it works!

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