Why are graduations caps square?
Here is a very old photo of me taken at my graduation ceremony in 1996, proudly wearing my graduation cap (very similar to the cap the logo I use for Deane’s English). The official name for such a cap is a mortarboard: a square board for a handle used for holding and carrying masonry mortar. Not the most glamorous of garments, I know, but certainly one which carries very happy memories!