What are the timers on blue/ reb buffs, dragon, and baron?

And are timers changed on pbe?

http://lmgtfy.com/?q=lol+jungle+timers

arent such external tools bannable?

You didn't even click on the link...

LOL the link is actually pretty funny.

But in all seriousness:
Buffs spawn at 1:55
Respawn every 5 minutes

Dragon spawns at 2:30
Respawn every 6 minutes

Baron spawns at 15:00
Respawn every 7 minutes

Just type in when they'll be back in your chat and check it once you feel like they should be back soon, i.e. if you kill dragon at 23:00, you type "Drag 29:00" and you can check it in your chat history.