alt Hacker NewsThe term Scandinavia sometimes includes Denmark. Sometimes not, especially if referring to the peninsula.
There's no English language authority dictating what the word "Scandinavia" does/does not mean. The language is its usage.
The first wikipedia paragraph does a good job breaking it down: https://en.wikipedia.org/wiki/Scandinavia
In Scandinavia or categorically always includes Denmark.
Only English speakers ignorant of the history of Scandinavia sometimes excludes it.
Tjere is no English language authority that has any business redefining what Scandinavia means at all. It's just insulting when English speakers believe they get to decide to redefine the names of regions that don't belong to them. It's rude.