Doesn't work for me, or friends/family who haven't had their birthdays yet this year. Once they've had their birthdays it adds up to 2022.
This concept was also reported on a number of years ago, not 1,000 by any means, and was correct for some people, but again not for everyone I knew until they'd had their birthdays, so it seems to be the year, not a particular date in that year.
A very weird concept!! I was about to post similar to @Hopeful34.
It's essentially some simple maths that's become distorted and mystified: https://www.snopes.com/fact-check/age-birth-year/originally posted in 2018 clarifies: "Claim Adding your age to your birth year equals 2,018 on one particular day that occurs once every thousand years."
Basically the sum of your age plus birth year and whether you've already celebrated your birthday will give a match to the current year for everyone every year.
So, a couple days of after your post on on the magical millennial 27th July date:
My current age and birth year equals 79+1942 which gives me 2021, but come my August birthday, then I will match 2022 too.
For my younger sister: 77+1945=2022; her birthday is at the beginning of the year so she fits. But due to this weird idea regarding age, for a time she could actually be a year older than me!
@Riva_Roxaban I'm more than somewhat relieved that my weight doesn't match too!