If Amtrak relents and lets 4449 out again. Let's see, there is March 7, 1951, August 4, 1944, January 2, 2018, and of course, one of my favorites, Christmas.
June 1st, 1953? CNR 6153, a magnificent 4-8-4 used in excursion service in the 60s after regular steam was ended. I have it on a coffee cup!