In what time period is A Doll's House set?

The setting of Ibsen's A Doll's House
is in the late 1800's Norway. The play was published in 1879 and caused immediate
controversy with its portrayal of housewife Nora and the decisions she makes that shook
her family as well as the country.  The story unfolds in the livingroom of the apartment
of Torvald and Nora Helmer. The opening scene begins on Christmas Eve and ends two
evenings later as Nora exits, slamming the door behind her.