<div dir="ltr"><div>I see the Wikipedia "Flag day (computing)" [1] article references two semi-different ESR sources [2,3] to support the claim:</div><div><br></div><div>> This systems terminology originates from a major change in the Multics operating system's definition of ASCII, which was scheduled for the United States holiday, Flag Day, on June 14, 1966.</div><div><br></div><div>I don't doubt the validity, but I'm looking for other "citation worthy" sources that supplement this claim --- ideally that predate the ESR ones, so that they are unambiguously independent.</div><div><br></div><div>1. <a href="https://en.wikipedia.org/wiki/Flag_day_(computing)">https://en.wikipedia.org/wiki/Flag_day_(computing)</a></div><div>2. <a href="http://www.catb.org/jargon/html/F/flag-day.html">http://www.catb.org/jargon/html/F/flag-day.html</a></div><div>3. <a rel="nofollow" class="external gmail-text" href="https://books.google.com/books?id=g80P_4v4QbIC&pg=PA192" style="color:rgb(92,152,214);background-image:url("blob:https://en.wikipedia.org/0b161538-587d-4598-9344-e755c13a4353");background-position:100% 50%;background-size:0.857em;background-repeat:no-repeat;background-origin:initial;background-clip:initial;border-radius:2px;padding-right:1em;font-family:sans-serif;font-size:12.6px"><i style="scrollbar-color: rgb(69, 74, 77) rgb(32, 35, 36);">The New Hacker's Dictionary</i></a><span style="color:rgb(211,207,202);font-family:sans-serif;font-size:12.6px">pp. 192–</span></div><div><br clear="all"></div><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div>-- </div><div>Royce Williams<br>Tech Solvency</div></div></div></div></div>