Facebook used to announce when our friends got engaged or married, and the messages appeared in the same areas as the birthday notifications. However, they seem to have disappeared some time ago; quite a few of my friends have gotten married in the past several months, and I only found out about the news by going to their profiles. Did Facebook remove this feature?
Facebook hasn't removed this feature
I believe if you go here whilst signed in to facebook and click on the cog in the top right ( the one next to the word