Palendrones are fun. I've tried a few at times, but haven't been successful very often.
Once I saw a sign that said "Step on" close to an escalator, but I realized that from the other side it said "No pets".
But concerning your post, I'm a little confused somewhere. (I've never delved into palendronic dates) What about the date in a little over 200 years on Dec. 22, 2221? Would that be 12-22 -2221. And backwards that would be 12-22-2221. Where am I wrong at?