from datetime import datetime
from datetime import timedelta

today = '2019-04-05'

today_number = datetime.strptime(today, '%Y-%m-%d')

before_2days = today_number - timedelta(days=2)
after_2days = today_number + timedelta(days=2)

with open('input/days.txt', encoding='utf-8') as f:
    for n in f:
        day = datetime.strptime(n.rstrip(),"%Y-%m-%d")

        if before_2days <= day <= after_2days:
            print(f"{day:%Y/%m/%d}")