.TH DAYTIME UCB 2/24/79 UCB
daytime \- give the time to human-reasonable accuracy
prints out in the English the current time of day,
accurate to the nearest fifteen minutes. Many people
find this type of abstraction useful, since it doesn't really
matter to them that it's 16:19 when all they wanted to know
is that it's "Quarter past four."
depends on the user to determine whether it's currently night