Find Anyone's Birthday

Here's a strategy for looking up anyone's birthday online that works 70% of the time. This method if mostly for people in the US, but you could modify it slightly to work for other countries.

First, look them up on https://stevemorse.org/birthday/zaba.html

If the name is unique it's easier. The site will list all occurances of the name you give it, and past residences of the person. Knowing a little bit about the person, you can figure out which one it is in the list. And next to the name and cities of residence, you'll see an age.

Take the age to https://stevemorse.org/birthday/privateeye.html   and enter what you know. It should come up with a birthday.

If it doesn't, the next step is go to Ancestry.com   where birth records from many states are archived. That site will at least list the birth year and month. You need to be a member, but many libraries have memberships to Ancestry.com  and will let you log in through their account if you belong to them.

Facebook is the last resort. You may need to scroll through a person's past to find the day their friends wished them Happy Birthday.