Through the On This Day tab, users can see what their friends were up to in years past on this day. For instance, users would see friends’ most popular posts in News Feed format, as well as see what else happened on that day (and around that time). In the sidebar, users can see life events such as a new pet or a new job. It also shows birthdays.
Facebook confirmed to Inside Facebook that this is something they’re testing in select users’ News Feeds, but didn’t offer any additional details.
Readers: Have you seen this?