national lowercase day (14 october)

another day of unknown origin and insubstantial observance
may be (sez crystal) a reaction against use of SHOUTY CASE in digital communication
anyhow, the subject (of 'bicameral' scripts) is interesting;
see especially the history
old roman cursive (1st century ad) shows the beginnings of some lower case letter-forms
but bicamerality did not become general in europe until 1300
and took some time to more or less stabilize in english
you probably noticed in the text quoted yesterday from the time of henry iv, all nouns capitalized (as still in german)
https://en.wikipedia.org/wiki/Letter_case#Bicameral_script