Hoodwinked or merely gullible?

I received the following email from my step-sister-in-law in Texas (my step-brother's wife), who just had a birthday:

We are all 2018 today –
Today the whole world is the same age! Today is a very special day. It happens only once every 1,000 years.
Your age + your year of birth = 2018. This is true for everyone.
It is strange and inexplicable! Try it and see! It will not happen again for another 1,000 years!

and thought immediately, 'That's ridiculous!'

It is not a very special day. Well, maybe it is, but it is not strange and inexplicable. It doesn't happen only once every 1,000 years.

I said in my reply that this was true all the time for everyone. It doesn't just happen in 2018. It happens every year. That's what one's age is, subtracting the year you were born from the current year. So it follows that adding your age to the year you were born, you will ALWAYS come up with the current year, provided that your actual birthdate has passed.

She wrote back that her son Sam and I were the only two to have figured this out and that we were real smarties!

My step-sister-in-law is not dumb, she just didn't think things through, or perhaps is easily swayed.

Her hair color is immaterial.

I take my compliments wherever I can find them, always remembering that Mama said to consider the source.