Enevhar Aldarion
Hero
Just to add to folks trying to time things from Unearthed Arcana articles Chris Lindsay finished his chapter of Candelkeep Mysteries in 2018.
Eh, I would be surprised if a few of the adventures that made it into Candlekeep were not written for that other short adventure project that was probably canned when Welch quit WotC. So I am sure there are others that are that old too.