Back In The Day is an interesting Windows Phone 8 app that lets you pull up photos or status messages from your Facebook account that were posted a year ago.
Back In The Day's interface is rather simple and straight forward. You have to sign into your Facebook account and give the app authorization to view your photos and status messages. Back In The Day does the rest by going back a year to see what you were doing.
You can also pin Back In The Day to your Start Screen to easily glance at your activity from a year ago.
There is an in-app upgrade available ($.99) that will search for your activities from the past ten years, include pictures you've been tagged in, share today's post, and more frequent Live Tile updates.
Back In The Day may not appeal to everyone but if you are a heavy Facebook user, it could prove to be an easy way to reflect on the past. I think if it had the option to pull up current events for that particular date it might have a little more appeal. Maybe have the ability to swipe between a Back In The Day page for Facebook and one along the lines of a "Today in History" page.
The core Back In The Day Windows Phone 8 app is free app and goes back up to two years with your Facebook updates and photos. You can find Back In The Day here in the Windows Phone Store. Again, to unlock the additional features and go back ten years it'll cost you $.99 with the in-app purchase.