I found the obvious information about how to 'import' Facebook birthdays into Google Calendar. Yet, this is not a true export/import, it just shows the Facebook birthdays in my Google Calendar without really copying the information.
I am leaving Facebook and I don't wish to lose all my friends' birthdays. How can I achieve this?
The link in the comments provides the same solution that I can find when googling the problem, but as I said, this does NOT copy the data, it just creates a dynamic URL link to it. The result will be that if I delete my facebook account, this iCal will disappear.
I am looking for a way to permanently EXPORT the birthdays and then IMPORT them as real data into my regular Google Calendar. I do not want an iCal link.