If you visit Google today, you will see a special logo for Rosa Parks. The logo is of kids near a bus and adults on the bus. The text behind the logo reads, “55th Anniversary: Rosa Parks refuses to move.” When you click on the logo, you are taken to a search result in Google for [rosa parks].
It is not her birthday, she was born in 1913 on February 4th. Today, on December 1, 1955, she refused to obey bus driver orders for her to give her seat up for a white passenger. Rosa Parks was a historic civil rights activist who was coined “the first lady of civil rights”, and “the mother of the freedom movement.”
Google remembered her today, on that historic day with the following logo:

As you may also know, today is World AIDS Day. Some are upset with Google that they don’t at least have a ribbon under the search box. If you visit Yahoo, you will see a nice flash or static logo for the day leading to events.yahoo.com/worldaidsday/2010/. Here they are:


Yea, Google should have added a ribbon some where.
Forum discussion at Google Blogoscoped Forums & Google Web Search Help.