Is there a way in AIX to schedule a script to run bi-weekly through cron?

I have a script that needs to run every other Wednesday, and this is what I thought I had to enter in the crontab file:

00 08 * * 3/2 /home/user/user.script

It didn't like that. It reports a syntax error. I'm almost positive that in Linux and/or Solaris something like that will work, or I may be totally off....

Any suggestions, would be greatly appreciated!

Thanks in advance!