what date was the united federation of planets founded in beta canon?

In beta canon, the United Federation of Planets is generally founded on August 12, 2161. Some beta-canon/alt-canon sources also give other founding dates, but August 12, 2161 is the most commonly cited one.

Date

• August 12, 2161

Note

• A few older or alternate expanded-universe sources mention different dates, such as October 9, 2161 or even earlier alt-canon dates, so the exact date can vary by source set.