What?!
And I thought it means " it's time for the Wolf to attack!"
I didn't get it neither.
Because phrases like that are not used is the west, they're more straightforward (I'm assuming from your flag that you live in the US) https://www.reddit.com/r/translator/comments/46fiik/japanese_english/
Pretty sure it's cultural. The origin in Japanese but Chinese people may have adapted it. https://www.google.com/amp/s/ramisatheauthoress.wordpress.com/2016/01/13/the-moon-is-beautiful-isnt-it/amp/
It isn't something hugely obvious even to people of those cultures. Anytime you say something indirectly, someone may not understand what you mean. Even saying “好き” (suki) can be vague because it technically means "like" and it isn't always obvious when someone means it romantically. So imagine how vague it is for someone to say “the moon is beautiful.”
It always pisses me off how no one ever gets what 'The moon is beautiful' means (╯°Д °)╯╧╧