Problem with code to calculate weekday for leap years!

[Event]

Thank you very much!

Now it runs perfectly! ;)
Made three separate "and"-operations instead of the nested if:s. Works like a charm!

elif month == 14 and (year+1)%400 == 0:
    while day>29 or day<1:
        day = int(input("Day:"))
        if day<1 or day>29:
            print("Out of allowed range 1 - 29")

elif month == 14 and (year+1)%100 != 0:
    while day>28 or day<1:
        day = int(input("Day:"))
        if day<1 or day>28:
            print("Out of allowed range 1 - 28")

elif month == 14 and (year+1)%4 == 0 and (year+1)%400 == 0 and (year+1)%100 != 0:
    while day>29 or day<1:
        day = int(input("Day:"))
        if day<1 or day>29:
            print("Out of allowed range 1 - 29")

---

Went ahead of myself!

This is the correct solution!

elif month == 14 and (year+1)%400 == 0:
    while day>29 or day<1:
        day = int(input("Day:"))
        if day<1 or day>29:
            print("Out of allowed range 1 - 29")

elif month == 14 and (year+1)%4 == 0 and (year+1)%100 != 0:
    while day>29 or day<1:
        day = int(input("Day:"))
        if day<1 or day>29:
            print("Out of allowed range 1 - 28")

Very thankful for your help!