When did I start following Denny's?

Google Amnesia goo·gle am·ne·sia, n.

An internet disorder phenomenon caused by the sheer simplicity and instant gratification of discovering an answer to virtually any question instantly, where the individual who performs the query quickly loses all memory of both the query and resulting information.

The reason this disorder is specifically linked to Google, and not other search engines, or simply, "Search Engine Disorder", is from the sheer simplicity and high success rate at immediately getting an answer through Google, the answer itself looses significance having been acquired so quickly. Also partially due to Google's near monopolistic share of search engine activity.