eventologist
n.— «After a little research I discovered that National Smith Day was created in 1995 by “eventologist” Adrienne Sioux Koopersmith of Chicago. She’s created not just Smith Day but 1,499 other “holidates,” as she calls them.» —“A Smith and Lesson: Go ahead and make your day—today” by Ken Smith Post-Intelligencer (Seattle, Wash.) Jan. 6, 2005. (source: Double-Tongued Dictionary)