I have seen some people on TikTok talking about the months RDR II's events (before the epilogue). Some people have said the first six chapters all take place in May 1899, but I doubt this since several weeks pass in the game in Chapter 1 and at the start of Chapter 2.
And because the story is so long, it probably doesn't all take place in one month. Some others have said the game starts in May and ends in late October or early November. Is there any proof in the game about the timeline of the game's events.