When did Wyatt Earp get married to Josephine?

Answer 1

... Earp left San Francisco with Josie (Marcus) in 1883 and she became his companion for the next forty-six years.

Although no marriage certificate has been found, they represented themselves as man and wife, which in the Old West was all that was necessary for a common-law marriage (and still is today in "Western" law states such as Colorado).

Earp and Marcus returned to Gunnison where they settled down, and Earp continued to run a faro bank.