birthday -> age in yeas and days left to next birthday

import datetime
from collections import namedtuple

Result = namedtuple("bithday", "years days_left")

def bcounter(bday: datetime.date) -> Result:
    day = datetime.timedelta(days=1)
    today = datetime.date.today()
    years = today.year - bday.year
    bday = bday.replace(year=today.year)
    if today < bday:
        years -= 1
    return Result(years, int(abs(bday - today) / day))