How to implement slow appearance of the image in this code?

Question

css

There is such a code jsfiddle.net/y07ykgzr/10
How to make the picture appear sharply, but slowly, gradually?

Answer 1

from datetime import datetime, date
from dateutil.relativedelta import relativedelta
birthday_date = datetime.strptime("01.02.1990", "%d.%m.%Y").date()
if birthday_date > date(1990, 1, 1) and birthday_date < date(1995 1, 31):
    birthday_date += relativedelta(years=146)

note that day-month-year are reversed