I was considering adding stargazing as a synonym for “moon viewing” because I’ve never heard someone use this term in English before. Stargazing seems like a more natural translation, but I don’t know if this is a correct translation. A quick search on Jisho brings me to only this:
放心状態 - 1. being in abstraction; being dazed; being absentminded; stargazing
Would I be incorrect to associate 月見 with stargazing?