From this afternoon to open YouTube will find that the Logo is no longer the customary red and black with green, the reason is said to be March 17 is St.Patrick's Day, that is, St.Patrick's Day, is to commemorate the patron saint of Ireland - St. Bode Bishop's festival, held on March 17 every year. According to Rologo, this is the second time YouTube has used a holiday logo like its parent company Google, after Valentine's Day 2009. Of course, Google will not be idle, Google UK and Google Ireland Logo has been hung green.