Stamps Celebrating Boston 2026 World Stamp Expo The U.S. Postal Service will issue two Boston 2026 World Stamp Expo Commemorative Forever stamps on Aug. 14, 2025, at the Great American Stamp Show in Schaumburg, Illinois. The first-day-of-issue ceremony, free and open to the public, will take place at 11 a.m. CDT at the Renaissance Schaumburg […]