Question:

What do you tell someone you didn’t see at New Year’s Eve?

Answer:

¡ɹɐǝʎ llɐ noʎ uǝǝs ʇ,uǝʌɐɥ I

Citations:

https://www.upsidedowntext.com/

https://www.riddlesandanswers.com/puzzles-brain-teasers/happy-new-year-riddles/