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willwright82/sakamoto-wday.rb

Created August 28, 2017 11:13
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Sakamoto Weekday
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sakamoto-wday.rb
def calc_wday(year, month, day)
a = (14 - month) / 12
y = year + 4800 - a
m = month + 12 * a - 3
wday = day + (153 * m + 2) / 5 + 365 * y + y / 4 - y / 100 + y / 400 + 2
wday = wday % 7
return wday
end
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