BdayLiker is a Ruby script that "likes" all birthday posts on your Facebook wall. It can be trivially extended to add a comment to each post.
Clone the repo
git clone git@github.com:Raduh/BdayLiker.git
Install the dependencies
If you don't have bundler installed
gem install bundler
then in the project root directory,
bundle install
Get a Facebook access token from here.
Fill config.json (in the project root directory) with the access token from
above and your birthdate.
Just run
./liker.rb