Read date of birth from user in dd-mm-yyyy format and show the day of birth in pytho

#Program to find your Day of Birth given Date of Birth
#indent and syntax problem may occur for different IDE 


-def main():
     
     d=input("Enter your date")
     m=input("Enter your month in mm format")
     y=input("Enter your year in yyyy format")
-     if( d>31 or m>12 or (y<1900 or y>=2000) ):
         print('INVALID INPUT')
     year = y-1900
     year = year/4
     year = year+y-1900
-     if m==1 or m==10:
           month = 1

-    elif m==2 or m==3 or m==11:
         month = 4
 -    elif m==4 or m==7:
         month = 0
 -    elif m==5:  
         month = 2
 -    elif m==6:
  month = 5
 -    elif m==8:    
           month = 3
-     elif m==9 or m==12:
           month = 6

     year = year+month
     year = year+d
     day  = year%7
-     if day==0:
          print('Day is SATURDAY')
-     elif day==1:  
         print('Day is SUNDAY')
-     elif day==2:  
         print('Day is MONDAY')
-     elif day==3:
         print('Day is TUESDAY')
-     elif day==4:
         print('Day is WEDNESDAY')
-     elif day==5:
        print('Day is THURSDAY')
 -    elif day==6:
print('Day is FRIDAY')
- main()