Just a mind-blaster thought. I've always thought that time is not circular. I disagree with the existance of days, weeks, months and years. I'm not quite sure how to explain my idea. I guess I see our reality as a plain chronogram, not as a circular one. Thus each moment is unique and it will never have a equivalent in the future. Therefore birthdays, wedding days, etc are just moments in the past that can be recalled anytime you feel like, but there will not be a day that matches the date again.
Anyway, this hypothesis took place one of the times I had to stay awake the whole night working on a project. Then I realized there was no point were you could say: "Ok, here ends Monday and begins Tuesday", if you were not aware of the time. Then, what is a day besides 24 hours, 1440 minutes or 86400 seconds? when there is no time, days do not exist either. It is just one straight time/space scenario.
So if you stay always awake there will never be a different day, you will never know when one ends and the other begins. Thus you don't live 85 years, you just live 1 long life.
Anyway, without hours, days, etc it would be impossible to plan anything. It would be pretty hard to organize a BBQ or a meeting. But, god, it would be pretty less stressing!
now ppl who read might think: ok, y in english?......just bcuz! n if u didnt understand "yo know a-blow S pagnol" right now...