If you give a contractor two days notice, they'll ask for a two hour extension at the literal last moment. If you give a contractor a two hour extension at the literal last moment, you'll lose an hour to lunch and other obligations, and discover four hours later that the entire next week's schedule has been derailed.
And then you'll go watch Captain Marvel again. It's definitely my new favorite movie of all time, displacing long-time champ The Abyss.