This is a How-To for getting a google birthday calendar with own entries and the calcualtion of the age ( if you dont remember :-) )
to use this code you must have a google login and use personal calendars
enable the google script apps
https://www.google.com/script/start/
After a successfull completion of this procedure you should be able to go to the AppScript Home site
https://script.google.com/home
and see your personal projects :
start a new project ..... name it ... and paste the code from my script-file
You must also setup and allow the usage of Googles :
- People API
- Calendar API
if done then launch the AppScript and watch out for the log infos....
if everything was setup correctly then you should modify an exitsing calendar with your new birthday-string for each person