nisus.com

The Nisus macro language has a date object construct. Unfortunately there is no easy way to create new date objects (except for 'now' objects). I am posting a package of macros with the principal one being a Make Date Object helper macro. This macro allows the user to specify a date as a string of the form "YYYY/MM/DD" and then get an object with that date. The other macros are mainly intended as sample to show things one might do with such objects.
Hope they are useful.

Thanks for sharing Philip! Although I must say, having any macro author (or more generally, any programmer) parse date strings is a great horror; really these tasks should be provided by the language, framework, or system. I apologize that you wrote this code

It is true that NWP macro Date objects can't easily be created for arbitrary points in time. However, the macro language does give you access to date information when useful, eg: the time a comment was made, file modification date, etc. But I understand the desire to create arbitrary dates as well– perhaps for matching comments or some such task. I'll file an enhancement.