The [Speil] Birthday Poster has been submitted and is now available for free download. Big thanks to the contribution from our member @axtona !
I dont like addons, which posts a new thread for every birthday wish so I created this addon.
You have to create a birthday thread and then set the thread id of this thread in the settings of this addon.
Now the cron job will check every day which users have birthday and post birthday greetings in this specific thread.