Early to bed, early to rise... doesn't seem to have the same meaning these days, if you consider the way in which our circadian rhythms shape our behaviors and patterns, both day and night.
Circadian rhythm patterns, also known as chronotypes, are something we are all born with, and these can vary greatly from one person to the next.
Big business is beginning to realize that Benjamin Franklin's proverb may no longer be relevant, given the wide differences in their employees' rhythms.
This has led to changes in the way the workplace is designed already (such as with the creation of flex time jobs).
The trend isn't going to go away any time soon, as research into circadian rhythms continues to show that the more that businesses ignore their employees' patterns, the more it may end up costing them in productivity overall.