Body clock

Holidays have a way of making my body clock so messed up. Normal school days, I am able to function with perhaps 6 hours of sleep? Now during the holidays, I can't seem to function with even 10 hours of sleep! And I have been staying up late every night, or rather early every morning, and messing up my body clock. And holidays have also a knack of making me put on weight. No motivation at all to exercise the slightest bit. Hahaha. Fat and lazy, that's me for you during the holidays. How on earth do people enjoy their holidays?