A collection of very random anniversaries on January 21st

There are at least fourteen anniversaries and / or observations on January 21st annually. And quite a few of them are so random, I wouldn't know what to write about them! So I've bundled a few into this post, so you can see for yourself and see what you think!

At the top of the list, I put "Golden Ratio of the Eyes Day". What a thing to make an annual anniversary! Moreover, it is observed not just once, but twice: on January 21st and December 1st. The date comes from the idealized “golden ratio” of the eyes—1 : 2 : 1—which is mirrored in the numbers 1‑21 and 12‑1. Who knew!? This anniversary seems even more pointless given the average Japanese eye ratio is said to be 1 : 1.5 : 1!

XXIO Day, observed on the 21st of every month, was established by Dunlop Sports Marketing to celebrate the long‑running success of its flagship golf brand XXIO. The date comes logo: “XXI”, the Roman numeral for 21. It's not unusual for a company to make an anniversary about a product, but it is more unusual for them to make it specific to a particular brand. But, in fairness, the anniversary worked as I now know that Dunlop has an XXIO brand, I never knew about before!

Another very specific brand with an anniversary today is Kobiki BLUE. Also on the 21st of every month Kobiki Day, was established by Unkai Shuzo, a Miyazaki‑based distillery known for producing authentic shochu. The date commemorates the nationwide launch of their premium sweet‑potato shochu Kobiki BLUE on March 21, 2017. 

A few other random anniversaries on the 21st include "Rivals Join Hands Day", "UniBEARsity Day" and "Sparty Personalization Anniversary". There are also two famous memorials today, but I don't know enough about either to write about them. They are "Kujo Memorial Day" and "Daikanki Memorial Day", the former for a famous haiku poet, Sugita Hisajo, and the latter for a famous novelist, Satomi Ton.