The United States Tricentennial is expected to take place in 2076.
A tricentennial marks 300 years, so the anniversary follows the 1776 Declaration of Independence by three centuries. The year 2076 is therefore 50 years after the 2026 semiquincentennial and 100 years after the 1976 Bicentennial.
The year is a projection on the anniversary timeline rather than a current event program. Planning for a tricentennial is not the subject of the America250 commission, whose work centers on the 2026 milestone. Still, the sequence helps explain the terminology used for national anniversaries.
The most common mix-up is treating 2076 as 2075 or 2077 because the Declaration was debated, adopted, and signed through a series of events in 1776. Anniversary labels conventionally use the year 1776 itself as the starting point.