Is it okay keep my phone turned off for a month?

is it okay to keep my htc one turned off for a month? as usually during my exams i dont use a mobile phone at all ? previously ive used s2 and iphone 5 n turned them off during my exams . but just out of curiosity i wanted to ask .

I don't see any possible problems

Yeah sure. The battery will lose charge over time, but I don't foresee any problems with the phone itself.

Yes.