2 and 1, Robot Teaching Calendar

"It has a ‘forwards n backwards’ property that came to me in a dream...The fact that 2-1-2112 (Feb 1) will be a Monday [and] that 2-1-1221 is also a Monday (at least according to the medieval calendar I have in my head -- they can sometimes vary due to Catholic/Protestant conflicts). It has other symmetrical properties also... these are entertainment, creative puzzle works for future artificial intelligence." -- George Widener