Why shouldn't school days start later?

school days shouldn't start later due to the fact we need a balanced amount of time in school. If school started later then we may have to get dismissed from school later. Having school at a later time also prepares students for the real world. Getting up for work is much easier when your used to getting up for school. If we push back school eventually the future generations will argue that the new time is too early until we have school late at night. The real issue is not getting enough sleep at night. If students could balance out sleep then they wouldn't feel the need to leave for school later. Not all students sleep in school, only the ones who didn't go to sleep at a reasonable hour.