From the NannyMUD documentation

LAST CHANGE

2000-12-19

FUNCTION

NAME
        time_in_chunks - Split seconds into years, months, etc.


LOCATION
	/obj/support

SYNTAX
	mapping time_in_chunks(int time)

DESCRIPTION
	This function returns a mapping with the 'time' given split into
	chunks of years. months, days, hours, minutes and seconds. Each
	chunk appears in the mapping for a certain index only if the
	corresponding value was non-zero.

	The indices are:
	y - number of years
	M - number of months
	d - number of days
	h - number of hours
	m - number of minutes
	s - number of seconds


NOTE
	This function assumes that every year is exactly 365 days,
	that every month is exactly 30 days, and that a day is exactly
	24 hours. Those assumptions aren't true in the real world.


EXAMPLE
	"/obj/support" -> time_in_chunks(937043767);

	returns the mapping

	(["s":7,"m":56,"h":9,"M":8,"d":20,"y":29])