The last numeric palindromic date on the Gregorian Calendar was 11-11-1111 AD or XI-XI-MXXI Anno Dominum, although time in 1111 AD for most of the Christian world was ruled by the old Julian Calendar, but Pope Gregory changed the calendar to stop Easter from wandering all of the months. Yesterday 02-02-2020 was the first time in 919 years that the date could be correctly read from right to left as well as left to right.
I checked to see what happening on ye olde 11-11-1111.
Nothing of note in the western world.
Then again it was a Saturday.
Another work day for the masses.
Yesterday was Super Bowl Sunday.
Kansas City won over San Francisco.
Otherwise nothing of note happened in the modern world.