A calendar date consisting of all like digits; i.e. month, day and at least the final two digits of calendar year are comprised of similar numbers. (Digits fall so that the numeric date will be repetitive.)
Superstition surrounds such dates in many cultures and religious/occult practices. The dates can be seen as being either good or bad omens, but most seem to consider the dates lucky or auspicious.
The last complete mono date of this decade will be 12/12/12 and will be the last mono date, or near mono date for at least a decade. After 2020, there will be combinations such as 02/20/20, but an absolute repeat will not occur again for a century.
Fogey/fogy /fougi/ sl. (early 18C+, orig. Scot) old-fashioned, stuck-in-the mud.
Person with old fashioned ideas which he is unwilling to change: Come to the disco and stop being such an old fogey!
You think me an old fogeyand an old tory, his thoughtful voice said. I saw three generations since O’Connel’s time. I remember the famine. Do you know that the orange lodges agitated for repeal of the union twenty years before O’Connel did or before the prelates of your communion denounced him as a demagogue? You fenians forget some things. (James Joyce, Ulysses. Penguin Books,1992. p. 38)