02/17/2011 10:00 pm ET | Updated May 25, 2011

HuffPost Readers Tweet Their Favorite Random Acts Of Kindness

Did the world feel a little bit nicer than usual on Thursday? Actually, it was.

February 17 is unofficially Random Acts Of Kindness Day, and people all around the country have taken a moment (or a few) to do something nice for someone else, just because.

We asked HuffPost readers what favorite random act of kindess they have given or received and got a slew of responses that made us feel warm, fuzzy, and somewhat more hopeful about the future of humanity.

If you need further motivation to practice some selfless giving, it turns out it's not so selfless. Practicing it regularly can be good for your health and your career and a study published last year by political scientist James Fowler of the University of California, San Diego, and medical sociologist Nicholas Christakis of Harvard University found that a single act of kindness can inspire many more. Meaning, the more you give, the more likely you are to receive.

If you missed your chance on Thursday to practice (or receive) a bit of good, don't worry, you've still got time -- The Random Acts Of Kindness Foundation has launched an Extreme Kindness Challenge that runs until February 20.

You can also tell us about your favorite random act by tweeting to @HuffPostImpact. Just add the hashtag #RAOK.

Check out the best tweets so far below and vote on which one is your favorite!

Random Act of Kindness Day