So guys, Crimes & Punishment, is done in the same way as the devil's daughter, so 6 cases to uncover here, let's start.
Case #1 - simple, this is an adaptation of the story of the same name, so it is set on 10-12 July 1895.
Case #4 - even if the dates imply, that it is set in 1894, it can't be true, since it's an adaptation set in 1897, so this is set in 3 January 1897.
Case #6 - this case is set during queen victoria's Jubilee on 22 June 1897.
Case #5 - this one it's tricky, I don't know much aside that it must take place between 3 January and 22 June 1897, it's probably set during spring of 1897 thanks to the weather.
Case #3 - The devil's Daughter gives us a canon date, which is 1895, what I don't remember is if it's July or august 1895. Going with August for now, cos July 1895 is full of stuff.
Case #2 - ok, this one is pretty simple, Sherlock and Watson goes on a Holiday after the success of their last case, but what case? Well from Case #1 to Case #3 there is only one case possible: The events of Sherlock Holmes: Nemesis, so this case has to be set the day after, so 20 July 1895.
End Scene - the last scene of the game sees Watson telling Holmes that they will have a new neighboor, setting up the events of the Devil's Daughter, so this scene has to be set on 0ctober 1903.