What exact year did "Lady Windermere's Fan" take place?

Oscar Wilde's first play, Lady Windermere's fan:
A play about a good woman was first staged in London's St. James's theatre in
the year 1892. It was published in 1893, and it would be 1 out of 4 major plays produced
during a time which is considered to be Wilde's "period of complete success", which
ended sadly with Wilde's arrest for gross indecency in
1895.

Lady Windermere's fan tells the
story about a 21 year-old young wife who receives, as a birthday gift, a fancy fan from
her husband. However, there are rumors that her husband is spending his money on a Mrs.
Erlynne who, in the end, is discovered to be a libertine woman, a stalker, a blackmailer
and also...Lady Windermere's real mother.

It is interesting
to point out the theme of the play because,compared to his other plays, this one is
Wilde's least universal. What this means is that the theme of Lady
Windermere's fan is somewhat old-fashioned when compared to the flexible
themes present in The importance of being Earnest, for example. The
enormous changes that Wilde experienced during the early and mid 1890's made him a
better writer with each play. Therefore, we can conclude that Lady
Windermere's fan was a kind of "experiment" in comedy of manners for Wilde.
Certainly one experiment that worked very well for his writing
style.