Here is a unknown day in the US calendar added by the US Congress.
A unknown day dealing with a unknown epidemic (Bibleless people)
Eunice K. Y. Or Fri 1 Oct 2004 1:17 BST
“30 September every year marks the World Bible Translation Day. The first Bible Translation Day was proclaimed by the U.S. Congress over 30 years ago in 1966 as requested by a group of linguistic scholars at the Universities of Oklahoma, North Dakota, Washington, Michigan, Indiana, California, Pennsylvania, Texas and many other places. 30 September also marks the day the first translator of the Old and New Testaments, Saint Jerome, died.
This is an important day for Bible translators worldwide, World Bible Translation Day allows them to highlight Bible translation as an on going need and basic tool in global evangelism. “