Between returns a slice of Times between the given start and end at each interval.

BetweenDates returns a slice of Times between the given start and end dates, adding the given years/months/days between each iteration.

BetweenDatesEach calls each for every time between start and end.

BetweenEach calls each for every time between start and end.

DaysInMonth returns the number of days in the month of t.

RollMonth adds months number of months to t (months can be negative).

TMax returns the later of two time instants.

TMin returns the earlier of two time instants.