system
A chat on subreddit /r/NoStupidQuestions
human
Tell your boss you'll take them as unpaid days. Holy Toledo, seven months is plenty of notice for him to prepare.

Also, if you haven't accrued TWO DAYS of PTO in seven months, you probably should be shopping around regardless.
gpt
A lot of jobs give you all the pto time upfront. oP may have burned them up