Iphone Calendar auto delete old entries?

[esadb]

Im using iCal on my macbook with the calendar app on my iphone to sync automatically using the google calendar (caldav)

Question is there any way that i can set it to delete old entries? right now my iphone has entries from over a month ago still listed. I have it set to sync back to 2 weeks but it doesnt seem to make any difference.

Can someone help me out? I guess my main goal is after a deadline of a entry delete it simple as that. Without me having to go in manually and delete entries.

Thanks