No online multiplayer sorry, it would be too difficult to implement. The hours system doesn't really fit the game in my opinion, since it's a Baldi's Basics clone, maybe for another type of FPE fangame.
I like the idea of a challenge where it takes place at night, it's like the secret gamemode but with regular collecting notebook gameplay.
If you really want a game to play with friends, just play FPE: Da Fangame or Fundamental Paper School on Roblox.