As an ode to the calendar, or maybe just because I think it is interesting to make the last week of every month "calendar week", we are going to discuss the dinosaurs that are featured in space on the calendar I bought from Brynn Metheney. This month's dinosaur is Serendipaceratops arthurcclarkei. An Australian discovery, Serendipaceratops is a questioned genus that is typically considered a nomen dubium. The back and forth disagreement between validity and not is weakly argued and not currently ongoing, but there are a number of reasons that the argument has taken place. The initial material of discovery consists of an ulna that has been described and disputed, but has been placed, as far as official placement has allowed, in a basal position within ceratopsians. Statistical studies conducted on the ulna have been used to secure this placement, but these have been doubted in the past. The studies for and against this dinosaur will have to be considered this week and discussed accordingly.