I am working on a site for a law firm who are requesting that the age of their team members be visible on the site. They are okay with the ages only updating on every new deployment, and do not want the entire birth year to be available statically on the front end (just the calculated output)
This is what my markdown file contains as their birthdate:
birthDate: 1992-04-24
Note that there may be a potential time zone issue for when the person has birthday, but I guess since you do this “every new deployment”, something like this should be good enough: