def is_leap_year(year):
    """
    Returns whether a year is a leap year
        - Leap years are any year that can be exactly divided by 4
        - Except if it can be divided exactly by 100 then it isn't
        - But if it can be divided exactly by 400 then it is a leap year
    """
    if (year % 4 == 0 and year % 100 != 0) or (year % 400 == 0):
        return True
    else:
        return False