system
A chat on subreddit /r/NoStupidQuestions
human
I am currently doing exactly this.  Gotta wake up for work in just under 7 hours, and thinking to myself "Meh, 5 hours is plenty enough."

Edit:  I've also heard it refered to as "revenge insomnia."
gpt
Psychologists typically associate RBP with a feeling of lack of control in your life. You simultaneously reward *and* punish yourself in the same manner, as a means to carve out a little personal time at an unnatural time of day, while  guaranteeing the exhaustion you already likely associate with day to day life — as a form of subconscious punishment for making time for yourself