Travis,
> Curious to know if there's an easy way to do what I'm trying to do.
> As of
> yet I haven't been able to find any documentation or examples that
> help.
> I basically want to be able to figure how how many 1st's and 15th's
> there
> are between date X and Y. Is there a simple solution?
Please see the Time/Date/Interval FAQ:
http://techdocs.postgresql.org/techdocs/faqdatesintervals.php
and the documentation:
http://www.postgresql.org/idocs/index.php?datatype-datetime.html
Finally, Joe Celko's book "SQL For Smarties" has a question andsolution very similar to what you ask above.
-Josh Berkus