VPL | Visual Programming Language

year=int(input("Year: "))
    while year<1583 or year>9999:
    print("Out of allowed range 1583 to 9999")
    year=int(input("Year: "))
leap_year=year%4==0 and (year%100 !=0 or year%400==0)


month=[1,12]
month=int(input("Month: "))
while month<1 or month >12:
    print ("Out of allowed range 1 to 12")
    month=int(input("Month: "))


day=int(input("Day: "))
if month==1 or month==2:
        month+=12
        year-=1        
if month in [1,3,5,7,8,10,12]:    
    while day<1 or day> 31:
        print("Out of allowed range 1 to 31")
        day=int(input("Day: "))
if month in [4,6,9,11]:
    while day<1 or day >30:
        print("Out of allowed range 1 to 30")
        day=int(input("Day: "))
if month==2:
    if leap_year:
        while day<1 or day>29:
            print("Out of allowed range 1 to 29")
            day=int(input("Day: "))
    

weekday = ( day + 13*(month+1)// 5 + year + year// 4- year//100+year// 400)% 7

if weekday==0:
    print("It is a Saturday.")
elif weekday==1:
    print("It is a Sunday.")
elif weekday==2:
    print("It is a Monday.")
elif weekday==3:
    print("It is a Tuesday.")
elif weekday==4:
    print("It is a Wednesday.")
elif weekday==5:
    print("It is a Thursday.")
elif weekday==6:
    print("It is a Friday.")`