What is with literally everyone on this forum thinking that I'm a guy? -.-
And i don't mean to never study, I just think that starting now is a waste of time. Compared to your other exams this year, half-yearlies are low in content so really, you shouldn't have that much to revise, most of your time will be taken up practising exam techniques. This is the only calm you're gonna get all year so may as well use it.
But at the end of the day, everyone has what works for themselves, so stick to that.