Tacky works pretty well.

For the leather in Calendar yes but not for the linen effects which are subtle and relatively nice yet fall into the same category.

I think most people are agreed that the issue with Calendar is more about it being bad rather than a specific design rationale or style.

Pseudoskeuomorphism, easy.

Kitsch

Ornamentation?

Baroque?

That's a good word for it.

There was a short-lived trend in design a few years back that used the term ”maximalism” to mean something similar - covering every surface, layering metaphors on top of metaphors, mixing traditions from all over.

Baroque is characterised by the ornamentation of every detail. Which is why I suggest the term "ornamentation".

Nostalgia.

Nostalgia seems like it better describes skeuomorphism than fake-skeuomorphism.

A notebook application that looks like a notebook is "nostalgic". Weather applications that look like my pants are not.