> But 1931 is after 1930?

Yeah, I think so too. Why?

> Are you already aware of terms that will only be coined in 2027? But 2027 is so close, why shouldn't you already know?

I think Wikipedia's information about the naming is likely only what could be sourced, and also the 1934 is about "formalization", and the 1930/1931 are more official messages that I guess there is still copies off, it wouldn't be a stretch to assume the word could been used in more informal contexts some year before that.