Just to show you the sequential order of the nos. dates.
And that it can only occur 6 times, or did in the 20th century, sorry i didn't explain it very well!
I doubt very much that any calendar date based on the Roman, then amended to the Julian then Gregorian has any significance to be honest. Even Jesus'
birthday is suggested ironically to be 4 BC or something.
It is however a cool date, sure to get a few 'No ways' down the local.
I do not think the sequence you mention has any special significance but you can look at a little Numerology to see if you find any meaning there. I
do not put a lot of faith into those ideas but sometimes people find them meaningful.