America250's national time capsule, buried in Philadelphia in 2026, is scheduled to be opened in 2276.
The 250-year interval mirrors the anniversary itself: materials placed in the capsule during the Semiquincentennial are intended for Americans living at the nation's 500th anniversary. The planned opening year is 2276, exactly five centuries after the Declaration's 1776 adoption.
The capsule was associated with Independence National Historical Park in Philadelphia, a location closely linked with the founding era. Its contents were designed to preserve a record of the United States during the 2026 commemoration.
A time capsule differs from an archive intended for regular research. Its purpose is delayed discovery, allowing future generations to encounter objects and messages selected by people living during the Semiquincentennial.