Most often, the Google logo change is timed to coincide with the birthday of outstanding scientists and cultural figures. The Doodle drawings reflect the work of Leonardo da Vinci, Albert Einstein, Andy Warhol, Nikola Tesla, Antonio Vivaldi, John Lennon and many others. A special design of the logo marks not only the anniversaries of outstanding personalities, but also individual companies, for example, for the fiftieth anniversary of Lego company created a Google inscription from the details of the designer of the same name. Other Google Doodle topics are historical events, religious and public holidays, and all sorts of festivals.
In the Russian domain of the search engine, the most striking logos from the Google Doodle series in 2011 were dedicated to the 450th anniversary of St. Basil’s Cathedral, the 100th anniversary of the State Museum Fine Arts named after A.S. Pushkin, Day of Russia, Day of Knowledge. Thematic designs of the inscription also celebrated the anniversaries of great Russians: 190th anniversary of the birth of F.M. Dostoevsky, 300th anniversary of M.V. Lomonosov, 90th anniversary of Yu.V. Nikulin and others.
Special interest among users is animated (moving) and interactive logos. So, on Halloween 2011, the company showed a doodle in the form of an accelerated shoot, on which its employees cut a logo out of pumpkins. You can interact with interactive logos if you hover the mouse over them. The user is invited to play on virtual guitar strings, play a mini-game or solve a puzzle.