Celebrate the Century is the name of a series of postage stamps made by the US Postal Service featuring images recalling various important events in the 20th century in the United States.
Ten of these sheets were issued, with each sheet depicting events of one decade of the 20th century, from the 1900s to 1990s. Fifteen stamps were embedded into each sheet. For the first eight sheets (1900s to 1970s) of the fifteen stamps, one stamp of each sheet was printed using the intaglio process, while the remaining fourteen were offset printed along with the rest of the sheet.
These gummed souvenir sheets had an unusually large format of 7½"x9" (190mmx229mm). The top left hand corner sported the decade in a number format, the entire background of the sheet was devoted a specific event of that decade.
The fifteen stamps were printed at an angle of 8°, the horizontal perforations ran from the stamps up to the edge of sheet. The stamps were arranged on the sheets in four rows, and nested in arrangements unique to each sheet. An area was devoted to the description of the decade as depicted by the stamps on it. The description of each stamp was printed on the gummed side of the sheet, behind each stamp.
The words Arts, Sports, Historical Events ran on the left hand edge, Technology, Entertainment, Science ran on the top edge, Political Figures, Life Style on the right hand edge of the sheet.