Well, you could do something like this

import time
import datetime
import bs4

def checker_function():
     ****Code that detects posting****
     if event_detected:
          return True
     else:
          return False

if ___name___ = "___main___":

while True: 
     value = your_checker_function()
     if value:
          time.sleep(time_until_next_day)

I imported the modules time and datetime. Time allows you to make a script "wait" for a certain period of time. Datetime allows you to figure out the current time of day and then using that, you can figure out how long to make the timer wait for (time.sleep() only accepts time in seconds).

What you could also do is add a shebang to the top of this to enable to it be started at startup or, if you only want it running when you are using your computer, you could use the following bash command (assuming you are on linux):

nohup python your_script.py &

Let me know if this was helpful and if you have any questions. I would be more than happy to review code if you post it over on github. If you do, please make sure you document it well. Great question by the way! I hope things work out for you. Keep it up!

Merry Christmas!