Date/period specifiers

The period to cover can be specified with what this software package terms a datespec. It has the following legal forms:

yyyy-mm
month mm in year yyyy
yyyy--ww
week ww in year yyyy
yyyy-mm--dd
a single day (day dd in month mm in year yyyy)
yyyy-mm-dd
another form specifying a single day
epoch (literally)
the entire period covering back to when data collection started.

he@nordu.net
Last modified: Tue Jun 17 15:33:05 MET DST 1997