Celebrate America’s 250th anniversary with a special one-day event at the Keystone Post Office!

On Friday, July 3, 2026, visitors can receive a commemorative America 250 Pictorial Postmark on their mail from 8:00 a.m. to 2:30 p.m. This limited-edition cancellation is a unique keepsake honoring the nation’s semiquincentennial and makes a wonderful souvenir for collectors, history enthusiasts, and anyone celebrating Independence Day in the Black Hills.

The event coincides with the U.S. Postal Service’s America 250 commemorative stamp release, featuring a patriotic design inspired by the Declaration of Independence. Pair the special stamp with Keystone’s exclusive pictorial postmark to create a memorable piece of postal history.

Event Details

• Date: Friday, July 3, 2026
• Time: 8:00 a.m. – 2:30 p.m.
• Location: Keystone Post Office
• Special Feature: America 250 commemorative pictorial postmark

Whether you’re mailing postcards home, collecting commemorative postmarks, or simply looking for a unique way to celebrate America’s 250th birthday, be sure to stop by the Keystone Post Office on July 3!