Google Today (March 4, 2010) Celebrate Antonio Vivaldi’s 332nd Birth Anniversary by displaying this Google Logo on all its homepages.

Antonio Lucio Vivaldi (March 4, 1678 – July 28, 1741), nicknamed il Prete Rosso (“The Red Priest”), was a Venetian baroque composer, priest, and famous virtuoso violinist. He was born and raised in the Republic of Venice. The Four Seasons, a popular series of four violin concerti, is his best-known work and is representative of the baroque period in European art music. Read more on Wikipedia.
Google Today(February 12, 2010) Celebrates the Start of Winter Olympic Games 2010 in Vancouver, Canada by displaying these Google Logos on all its homepages.
Google Logo for February 12, 2010:

Google Logo for February 13, 2010: Luge Logo

Google Logo for February 13, 2010 Replaced with Snowboarding Logo:

Google Logo for February 14, 2010: Figure Skating

Google Logo for February 15, 2010: Skiing

Google Logo for February 16, 2010: Curling

Google Logo for February 17, 2010: Skiing

The 2010 Winter Olympics, officially the XXI Olympic Winter Games or the 21st Winter Olympics, is a major international multi-sport event held on February 12–28, 2010, in Vancouver, British Columbia, Canada, with some events held in the resort town of Whistler, British Columbia and in the Vancouver suburbs of Richmond, West Vancouver and the University Endowment Lands. Both the Olympic and Paralympic Games are being organized by the Vancouver Organizing Committee (VANOC). The 2010 Winter Olympics will be the third Olympics hosted by Canada, and the first by the province of British Columbia. Previously, Canada was home to the 1976 Summer Olympics in Montreal, Quebec and the 1988 Winter Olympics in Calgary, Alberta. Read more on Wikipedia.
Google Today(February 3rd, 2010) Celebrates the Birthday of Norman Rockwell, an American painter and illustrator by displaying this Google Logo Today across all its homepages.

Norman Percevel Rockwell (February 3, 1894 – November 8, 1978) was a 20th-century American painter and illustrator. His works enjoy a broad popular appeal in the United States, where Rockwell is most famous for the cover illustrations of everyday life scenarios he created for The Saturday Evening Post magazine over more than four decades. Read more about Norman Rockwell on Wikipedia.