Lag/Freeze

This might have been answered in a previous thread; I apologize early if it did happen.

So for the past week I was playing from 6:00 A.M., UTC-08, DST in effect. For a few hours, though, everyday, I somehow experienced serious lagging in the game. The lagging often went to a point where the game suddenly froze on me, and only I could move around for a limited amount of time before it just shut down. However, after around 7:30 A.M. or so, it returned to normal again. I tried with both Game Booster on and off, and they produced the same results.

Could anyone help me out? Thanks.