التاريخ والوقت في Python وحساب الأيام حتى عيد الميلاد

from datetime import date, datetime, timedelta

def next_birthday(month, day, today=None):
    date(2000, month, day)  # Validate month/day, including 29 February.
    today = today or date.today()
    def in_year(year):
        if month == 2 and day == 29:
            try:
                return date(year, month, day)
            except ValueError:
                return date(year, 2, 28)
        return date(year, month, day)
    candidate = in_year(today.year)
    return candidate if candidate >= today else in_year(today.year + 1)

if __name__ == "__main__":
    now = datetime.now()
    print("Local time:", now.strftime("%Y-%m-%d %H:%M:%S"))
    print("One week ago:", now - timedelta(weeks=1))
    print("After 100 days:", now + timedelta(days=100))
    try:
        month = int(input("Birthday month: "))
        day = int(input("Birthday day: "))
        upcoming = next_birthday(month, day)
        print("Next birthday:", upcoming)
        print("Days remaining:", (upcoming - date.today()).days)
    except ValueError as error:
        print("Invalid date:", error)