9-1-1 is number we call for emergency services, wasn't referring to the date.
In some parts of the world, it is or was 9-9-9. Shortened by lazy North Americans when phones had a rotary dial, not push buttons. It's faster to dial 9-1-1 than 9-9-9...
To answer your question, and throw a little trivia down for bonus points.
Money Can't Buy Happiness. Poverty Can't Buy SHIT! You Choose!