You can easily change the date that RSVP's will close for your event.
Follow these steps to access RSVP options
1.Log on to memberplanet
2. Click Events
3. You're now on the admin page. From here, click on the first bar titled 'RSVP Options'
4. Extend the drop-down menu to the right of "RSVP's Close"
5. Choose a new date for your RSVP's to close
6. From here you can customize a number of RSVP options