Where did you get that from? Does this mean that someone born in 1950 was born "in the 40's?" I would counter that the 20's starts when the leading digit is a 2, not when the trailing digit is a 1.
Counting has always started at 0 for me. Just like daily time starts at 0000 ("zero hundred hours") and goes to 2359. But then, I'm an engineer/computer programmer.
I've done so much without help, nowadays help is just in the way.
The hidden funny that makes that meme so hilarious is that the battery, a 24-DLG, is a battery from Auto Zone not walmart.
Apparently you don't take well to people with different opinions or life experiences than yours.
Funny enough, you are possibly correct. I probably didn't need to (but I can't remember that far back to be certain). I was always two to three years ahead of grade level in math in primary school. Perfect score in math on college entrance exams. Many years of high level math in college. I actually wanted to major in math, but chose engineering instead because a degree in mathematics mostly leads to teaching - and I had no interest in that.
I didn't ask because I didn't know the answer. I asked as a rhetorical question. I actually did try to Google to see if there is any precedent for what you claim. 1950 is considered to be "in the 40's". I found exactly zero support for that. However, I did find much support for 1950 being in the 50's. Here are a few random examples of what I found when querying what was considered to be "in the 40's":
I'd be happy with eleventeen if it led to twenty four!
