Hansen wrote:

At my work we have a public folder containing all employees
(contacts) and they have their birthday entered. When I add the
public folder to "Other contact" I don't automatically get their
birthdays in my calender - I have to change something in the contact
and then save.
There must be an easier way than to get the birthdays in my calender
than to go through every single contact.?

Why do you think there "must" be? Nothing I've ever seen posted has
indicated there is any other way except, perhaps, for some third-party tool,
and I don't recall seeing any mentioned that will perform the action.
--
Brian Tillman