I don't believe it

I'm sorry but I don't believe for one bit that temper tantrums don't happen until a child is 1 years old. My LO isn't even 11 months yet and he's been throwing huge fits for the past 2 days. He's been having tantrums as early as 9 months but these ones now are just too much. Sometimes if something doesn't go his way, he starts crying, screaming, throwing his head back and rolling on the floor. It can also start off with biting and hitting. There are times where if his toys don't do what he wants them to do, he'll hit them. If anyone accidentally hurts him, he'll bite or hit. Ever since he started walking properly, he's been very naughty.