I'm not sure I totally understand the problem, but here's some ideas.
You could use SSI to pull in a file that has the current date for those links. Then you would only have to change it once a day, or you could even use a cron job to change the date every night in the include file.
Easier yet, you might even be able to get a current date variable by doing this:
Code:
< !--#echo var="DATE_LOCAL" -- >