Did you know that May 21 is National Memo Day? Memo Origin: Latin for memorandum Meaning: ‘it must be remembered’ Memorandums, MOUs, memos – whatever you call them, they play a large role in everyday life. History of the Day While memos have been around for thousands of years, it was not until 1989 that a radio station officially declared May 21 as National Memo Day. A station in Colorado started the day to raise awareness about memos that were being used…