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#Reesun Huang
#zeller
#algorithms:zeller.algorithms
#2010.09.02
def zeller(month, day, year):
#define the value of month
value_month = {'Mar':1, 'Apr':2, 'May':3, 'Jun':4, 'Jul':5, 'Aug':6, \
'Sep':7, 'Oct':8, 'Nov':9, 'Dec':10, 'Jan':11, 'Feb':12}
str_R = {0:'Sun', 1:'Mon', 2:'Tue', 3:'Wed',\
4:'Thu', 5:'Fri', 6:'Sat'}
century = int(year) / 100
year = int(year) % 100
W = (13*value_month[month] - 1) / 5
X = year / 4
Y = century / 4
Z = W + X + Y + int(day) + year - 2*century
R = Z % 7
print str_R[R]
return
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