Outlook into the past
At work, as an occasional user of micros~1's finest (I usually work on a Linux desktop) I am regularly reminded to my bewilderment of meetings hours, days and weeks in the past. Whenever I turn my Windows machine on and Outlook starts up, it reminds me of all meetings that have taken place since the last time Outlook was up and running.
While a similar feature of facebook shows you pics you posted years ago may evoke fond memories, the reminder of yesterweeks meeting is simply pointless.