It would be useful for certain apps like /www/awstats to update their database
on the last hour of the month since putting the cron job on the 1st of the
month makes the software update in a new month and putting it on the 30th of
the month might loose 1 day.
As Lowell noted, "last day" isn't an option currently. Any number of
scripting languages, though, are capable of handling this.
Here was a solution we came up with, using PHP, a couple years