Americans and Canadians write it as they say it: “February 22, 2022” is written as 2/2/22.
Others write it from smallest to largest unit of time: day/month/year, so 22/2/22.
As for the numerology, various sources have it that 2 means balance, femininity, intuition, peace, union, new beginnings, and related stuff.
In Pythagoras’s system, 2 is the female symbol and 3 is the male symbol, so 2 + 3 makes 5 the marriage symbol. Does that mean couples should wait until 3/3/33 to form new beginnings that will be peaceful and balanced unions? Or will it be 5/5/55?