zellercode

def zeller():

    #accept year from user, transform it to an integer
    year = int(input("\nEnter year (e.g., 2008): "))
    #print error if year is 1752 0r less
    if (year < 1753):
        print("Year must be > 1752. Illegal year entered:", year, "\n")
        return
    #accept month, transform to an integer
    month = int( input("\nEnter month (1-12): "))
    #print error if month is invalid
    if (month < 1) or (month > 12):
        print("Month must be in [1..12]. Illegal month entered:", month, "\n")
        return
    #accept date, transform to integer
    d = int(input("\nEnter day of the month (1-31): "))
    #print error if month is invalid
    if (d < 1) or (d > 31):
        print("Day must be in [1..31]. Illegal day entered:", d, "\n")
        return

    #Adjust for january and february
    print("before")
    if (month == 1):
        m = 13
    elif (month == 2):
        m = 14
    else:
        m = month
        return

    print("after")
    #Adjust year in case of january and february
    Y = 0
    if (m == 13) or (m == 14):
        Y = year - 1
    else:
        Y = year
        return
        print(Y)
    #Compute K
    K = Y % 100
    #Compute J
    J = Y - K


    #Compute h
    h = (d + (13 * (m + 1))//5 + K + K//4 + J//4 + 5*J ) % 7

    #Convert h to days
    if (h == 0):
        day = "Saturday"
    elif (h == 1):
        day = "Sunday"
    elif (h == 2):
        day = "Monday"
    elif (h == 3):
        day = "Tuesday"
    elif (h == 4):
        day = "Wednesday"
    elif (h == 5):
        day = "Thursday"
    elif (h == 6):
        day = "Friday"
        return

    #Print result
    print("Day of the week is", day)

zeller()