https://techcrunch.com/2019/01/14/facebook-adds-the-option-to-share-events-to-stories-message-friends-interested-in-going/

Facebook wants to make it easier for users share events and coordinate with friends before the event’s start. The company this morning said it will test a new feature that lets users share those events they’re interested in attending to their Story, then make plans to meet up with friends who also plan to attend.

The test will involve a new option to “Share to Your Story” that appears when you visit an event’s page on Facebook. If shared, friends will see a tappable sticker within your Story that includes the event details, and lets friends respond that they’re also “interested” right from the Story itself.