On August 17, 2007, in Stamford, Connecticut, the Postal Service issued a 41-cent, Celebrate! special stamp. Ethel Kessler of Bethesda, Maryland, designed the stamp.
The stamp design consists of twelve colorful blocks arranged in four horizontal rows, with three blocks in each row. Each block in the top three horizontal rows contains a single letter of the alphabet, and together the blocks spell out the word "Celebrate." The three blocks in the bottom row contain an exclamation point, a star, and the denomination.
Sennett Security Products and Banknote Corporation of America printed 60 million stamps in the offset process.
Postal Bulletin (July 19, 2007).