For more information check out what calendar event add-ons are.

You will need to first add the actual calendar event if you have not done so already.   From there:

1. Find the calendar event that you will be adding a calendar event add-on to - you can do this from the Tendenci console.
   
2. Under the calendar event module click the Search link.
   
3. Find the Calendar event using the advanced search features and click the next to the event you would like to edit. 
   * You can also find your event by simply clicking on  and searching using the Month view.
4. Scroll down to section J and click on the Add link for a calendar Event add-on.
   
5. Here you will need to fill out fields for the Add-on event:
   
   
   
   • Name - name of the Add-on event.
     
   • Description - details about the Add-on event.
   • Location - this may be the same as the main event or it may be a new location
     
   • Pricing - this is the fee for the actual Add-on event  (Note - you do only have one field for pricing in Event Add-ons.
   • Start Date/Time: this is where you indicate the start date for the Add-on.
     
6. Then click the Submit button.