next_birthday

import calendar
import datetime


def next_date(date: datetime.date, today: datetime.date | None = None) -> datetime.date:
    if today is None:
        today = datetime.date.today()

    if date.month == 2 and date.day == 29:
        if not calendar.isleap(today.year):
            this_year = datetime.date(today.year, 3, 1)

        if not calendar.isleap(today.year + 1):
            next_year = datetime.date(today.year + 1, 3, 1)
    else:
        this_year = datetime.date(today.year, date.month, date.day)
        next_year = datetime.date(today.year + 1, date.month, date.day)

    return next_year if today >= this_year else this_year


print(next_date(datetime.date(2004, 10, 12)))
print(next_date(datetime.date(1984, 2, 29)))