Favorites
Favorites is your short list of events you do not want to miss and people you want to keep up with. Only you can see it.
Save an event
Tap the star, in the list or on the event's page
Find it in Favorites
Under Events, in date order. Tap the star again to remove it
Follow a person
Open their profile and tap Favorite
See what they are up to
Upcoming events from people you follow
Past events drop off the list by themselves.
Go deeper:Notifications →Sharing an event →
Past events drop off the list by themselves.