Battle Pass from Fortnite?

My little brother loves playing Fortnite but he doesn't have the Battle Pass!
It's his birthday in September and I want to give him the Battle Pass. But I don't know myself very well in the game. Would he still get the things (skins, bags, etc.) that were previously locked.
Please help me because he loves Fortnite and wants the Battle Pass so much.

If it's a new season then no if it's the same then yes

The skins, back accessories etc. He won't get the current Battle Pass because it can only be purchased until the end of August. He would get another Battle Pass in September