Main article: Google's hoaxes

Google has a tradition of creating April Fool's Day jokes—such as Google MentalPlex, which allegedly featured the use of mental power to search the web.[137] In 2002, they claimed that pigeons were the secret behind their growing search engine.[138] In 2004, they featured Google Lunar (which claimed to feature jobs on the moon),[139] and in 2005, a fictitious brain-boosting drink, termed Google Gulp was announced.[140] In 2006, they came up with Google Romance, a hypothetical online dating service.In 2007, Google announced two joke products. The first was a free wireless Internet service called TiSP (Toilet Internet Service Provider)[142] in which one obtained a connection by flushing one end of a fiber-optic cable down their toilet and waiting only an hour for a "Plumbing Hardware Dispatcher (PHD)" to connect it to the Internet.Additionally, Google's Gmail page displayed an announcement for Gmail Paper, which allows users of their free email service to have email messages printed and shipped to a snail mail address.

Google's services contain a number of Easter eggs; for instance, the Language Tools page offers the search interface in the Swedish Chef's "Bork bork bork," Pig Latin, "Hacker" (actually leetspeak), Elmer Fudd, and Klingon.[144] In addition, the search engine calculator provides the Answer to the Ultimate Question of Life, the Universe, and Everything from Douglas Adams' The Hitchhiker's Guide to the Galaxy.[145] As Google’s search box can be used as a unit converter (as well as a calculator), some non-standard units are built in, such as the Smoot. A newly discovered easter egg is the spell-checker's result for the properly spelled word "recursion". The spell-checker built into Google search returns "Did you mean: recursion?" in a recursive link back to the same page.[146] Google also routinely modifies its logo in accordance with various holidays or special events throughout the year, such as Christmas, Mother's Day, or the birthdays of various notable individuals.her logo switches are based on search terms. For instance, if the term "ascii art" (all lower-case required) is searched, an ASCII art version of the Google logo will appear next to the search