"Organizations and institutions across America – from federal agencies to tribal nations, from nonprofits to corporations, and from state commissions to local community groups – will play a vital role in marking America’s 250th anniversary. These organizations will lend their expertise and resources, craft memorable events nationwide, and help engage all Americans in this historic commemoration." (from
https://america250.org/about/partners/)
Keep checking the America250 website, and conduct your own web searches to see if the community in which you are planning an event has established an America250 organization.
Key links: