A healthy individual requires a minimum amount of 6 hours of sleep to function normally during the day. But it is not the only duration that plays an important role, routine is equally vital for good sleep. Our bodies have a natural clock that gets aligned to our daily routines. Inconsistency in routine is a cause for higher time to sleep, insomnia, daytime sleepiness, etc.
To track routine effectively one needs to access the sleep information for multiple nights. One can select a pair of dates to access trends for routine and duration between them, by default weekly and monthly pairs are displayed.