This code is supposed to print the day corresponding to a date..... The main() function is not being executed.....why?

Question

date=input("Enter the date in 'dd/mm/yyyy' format")
day=int(date[0:2])
month=int(date[3:5])
year=int(date[6:11])

def calculate():
a=int(year/4)
b=int(year/100)
c=int(year/400)
if (year%4==0 and year%100!=0) or (year%4==0 and year%400==0):
yearcount=(year-1)*365+a-b+c-1
else:
yearcount=(year-1)*365+a-b+c
ar=[31,28,31,30,31,30,31,31,30,31,30,31]
i=0
monthcount=0
while(i<month):
monthcount+=i
total=yearcount+monthcount+day
return total

def giveDay(total):
if total<7:
if total==0: print(date,"/",month,"/",year," is Sunday!")
elif total==1: print(date,"/",month,"/",year," is Monday!")
elif total==2: print(date,"/",month,"/",year," is Tuesday!")
elif total==3: print(date,"/",month,"/",year," is Wednesday!")
elif total==4: print(date,"/",month,"/",year," is Thursday!")
elif total==5: print(date,"/",month,"/",year," is Friday!")
elif total==6: print(date,"/",month,"/",year," is Saturday!")
else:
if total%7==0: print(date,"/",month,"/",year," is Sunday!")
elif total%7==1: print

Answer 1

In python functions have to be made before you call them, so the order of the functions should be
calculate():
giveDay(total):
And the "main" (assuming you mean the first code block)

Then in the main you call calculate() and giveDay(total)

You should have the calculate function take in a parameter for the year variable as well.

Answer 2

Jan Markus this is exactly what you are telling.....an exercise

I know such programs already exists

Answer 3

Kilowac the code that I posted has been cut down, I did exactly what you told
Then
I implemented

If __name__=="__main__":
main ()

In main() I called calculate() and giveDay()

Still not working