I was today years old

Stop... no... what...?

And when the 'BR' on the Baskin Robins sign looked like a 31, which is how many flavors of ice cream they have?

Uh...nah.

America's roast beef, yes sir

Same.

This wasn't common knowledge?

From Wikipedia: “The brothers wanted to call their restaurants ‘Big Tex’, but that name was already used by an Akron business. Instead, they chose the name ‘Arby's’, based on R. B., the initials of Raffel Brothers.”

Oh my. I am almost 40. No idea.