How do I add a Buy Tickets button on my Facebook event?

This facility is offered by Facebook - you need to enter your Skiddle event URL when creating the event.

To add a link to a website where people can buy tickets to your Page's event:

1. Set up an event with an online ticketing service
2. Go to your business's Facebook Page
3. From the sharing tool at the top of your Page's Timeline, click Offer, Event + and then click Event
4. Next to Tickets, enter the web address where people can buy tickets to your event
5. Finish adding details about your event and click Create

If you've already created an event for your Page and you want to add a link for people to buy tickets to it, edit your Page's event:

1. Go to your Page's event
2. Click Edit in the upper-right corner
3. Next to Tickets, enter the web address where people can buy tickets to your event
4. Click Save

When people visit your Page's event, they'll see a link to Get Tickets, which will send them to the web address you provided.

More information and a step-by-step guide is available here: https://www.facebook.com/help/429428587125183