Im new to this,help out with timer

can i link saved information on a textboxw from screen1 and link it up with a timer?
i mean when i put like “8 pm” can i link it to a timer into screen2 so it can countdown and gets a notification?
sorry english bad help

Are you using App Inventor or Thunkable X?

Also why have you created 2 topics about the same thing just 3 hours apart?