] ] General Tilney makes Catherine leave on a Sunday. In `Persuasion', written much later, Sunday travelling appears as something of a vice, but nothing is made of it here.

...
] ...I was aware of such taboos because I read of a practice (it was in America, the 1800s) where no work or play was done on Sunday. ...

In the 1940ies in Sweden some schoolfriends of mine were not allowed outdoors to play on a Sunday.
And even in the sixties there used to be only one, or later on, two films shown in the theatres on Good Friday. There was one called Barabbas from the novel of Swedish writer Pär Lagerquist and one based on Kai Munk's novel about Joanne of Arc.

Historically I have heard that labour should be kept to a minimum and that anything spinning round like the wheels on a carriage or the wings of a mill was considered sinful. So perhaps this is why Henry mentions Sunday.