[Today's lecture related info] The copyright status of "Happy birthday" song

Thank you Karl Thomas for this very interesting update. The "Happy birthday" song is finally in the public domain - the decision became final in February 2016.

You can read all the story on wikipedia, "copyright status" section. And you are now free to sing asmuch as you like " Happy birthday" to Yulai at the seminar tomorrow. :-)

Thank you for the attendance and contributions for this year!