Automata theory date checking task from school as program

program.py

# Automata theory task from school as quick & small a program
# A company wants to award employees who started working in the company in the year 2006 with a pay bonus.

# Probably a lazy way to do it but works great for only 12 months
thirtymonths = ["04", "06", "09", "11"]
thirtyonemonths = ["01", "03", "05", "07", "08", "10", "12"]

print("When did you start working in this company?\nPlease input your date (DD.MM.YYYY): ")
datearray = input().split(".") # Stops execution of the whole program until input was submitted

# Datearray needs to have the length of 3 otherwise something is missing
if len(datearray) != 3:
    print("You input seems to be incorrect. Please respect the formatting.")
    exit()

# Define arr entries as variables to make them easier to access, convert to int and catch exception if user's input was garbage
try:
    day = int(datearray[0])
    month = int(datearray[1])
    year = int(datearray[2])
except:
    print("You input seems to be incorrect. Please respect the formatting.")
    exit()

# Check if day is positive
if day < 1:
    print("The day you enter must be greater than 0!")
    exit()

# Check if month is positive and not greater than 12 (Aliens are not supported, Sorry!)
if month > 12 or month < 1:
    print("The month you enter must be greater than 0 and smaller than 12!")
    exit()

# Only year 2006 is allowed so stop don't even bother checking anything else
if year != 2006:
    print("You aren't allowed to be awarded a bonus.")
    exit()

# Check if day matches max days in month
if month in thirtymonths: # month with 30 days
    if day > 30:
        print(f"The month {month} has only 30 days.")
        exit()

elif month in thirtyonemonths: # month with 31 days
    if day > 31:
        print(f"The month {month} has only 31 days.")
        exit()
    
elif datearray[1] == "02": # 2006 was not a leap year so February had 28 days
    if day > 28:
        print(f"The day {day} you entered is invalid!")
        exit()

print("You are allowed to be awarded a bonus!") # Hurray 🎉