"Life" is regulated by 2 timers:
A "life" timer, like at the age of 1yo you should know how to walk, at 2yo, start to speak, at 6yo, go to school, etc...
And a "day" timer, like waking at 7am, have breakfast, go to work til 12h ha lunch, go back to work, etc...
And then comes the "unexpected events" like an accident, a divorce, parenting, etc...
Then it's a matter of avoiding conflicting events... like, you can't have lunch if you had an accident minutes before...