Looking to keep track of birthdays and age for a profile? You can accomplish this using custom fields
Steps:
Add a custom field named "Birthday" (see this help desk article).
Leave the default value as empty since we do not want default dates to be assigned to profiles without birthdates.
Set a birthday for a profile on the profile detail section.
You will see a custom attribute "Age" alongside the other core attributes.
Video:
Screenshots:
