The most important part of organizing any event is making sure you invite the right people. For example, if you're planning a birthday party, you might want to invite the same friends who went to a fun BBQ the weekend before. To enable this, we recently added the ability to invite friends to an event based on who was invited to past events you've attended.

This new feature of Facebook Events works by allowing you to filter your friends by recent events. When inviting friends to a new Facebook event, click on the tab labeled "Filter Friends" in the upper-left corner. The drop-down menu will display the five most recent events you either created or attended in the past month.