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week

subject fact

week has value 7 days 2001-09-27 09:32:53.0
has definition An arbitrary period of days, usually seven days; approximately equal to the number of days counted between the four phases of the Moon. (See lunar phases.) has source: Seidelman, P. 1992 Explanatory Supplement to the Astronomical Almanac, University Science Books, Mill Valley, CA, 2001-09-27 09:32:53.0
is a kind of time unit

time unit is a unit of time 2001-09-27 09:32:52.0

unit has historical origin 2001-09-27 09:32:42.0
represents

week	has value 7 days
	has definition An arbitrary period of days, usually seven days; approximately equal to the number of days counted between the four phases of the Moon. (See lunar phases.)
	is a kind of time unit
time unit	is a unit of time
unit	has historical origin
unit	represents