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Open Facebook.com in a web browser. Click the Search field. Enter a keyword into the Search field. Hit Enter on your keyboard. Click the Posts tab. Select a post date under DATE POSTED.
If you aren't automatically signed in, sign in with your Facebook account. You will need to enter your email or phone number and your password. The Search field is located on a blue bar at the top of your screen. This will allow you to search all people, posts, and photos. This will search and list all the matching results, including groups, photos, people, and pages. This button is located next to All below the Search field at the top of the page. It will list all the public posts and your friends' posts matching your search keyword. Find the DATE POSTED heading on the left sidebar, and choose a date here to see a list of older posts.