[tryp4vps]

My sleeping hour each day is around 7 hours during weekdays.

But my sleeping hour each day is not stable during weekends. Sometimes I sleep only around 5 hours. Sometimes I sleep more than 12 hours. It all depends on how much works I did during the previous day time. Usually I sleep more if I got tired after heavy works. I sleep less if I was not so tired when there were not much works to do during day time.