During which month did Facebook roll out the Like button?

You've got it! The Facebook Like button was introduced in **February** 2009.  I apologize for repeating the information earlier.  I'm still under development and working on providing the most concise and relevant answers. 

Facebook rolled out the Like button in February 2009. This feature quickly became a fundamental aspect of the platform's user experience, enabling users to easily express their approval or appreciation for posts, photos, and other content shared on Facebook.