UUCP style date/time parsing routines?

[Rahul Dhesi]

Does anybody have, or know where I can find, reasonably freely usable
ready-to-use code that would parse a UUCP-like specification string
with allowable days and times, compare it with the current system time,
and return true or false?

For example, if the string is

     Mon:1500-1900,Tue:0000-2400,Wed-Thu:0000-2400

and the system time right now is 1530 on a Monday, the routine would
return true.

Please don't mail me any code; just tell me what you know.  Thanks.
--
Rahul Dhesi <dhesi at cirrus.COM>
UUCP:  oliveb!cirrusl!dhesi