Today on the Google home pages worldwide is a Google Logo, aka Google Doodle for the birthday of Nelson Mandela. This is his first birthday since after his death in 2013.
Here is a static photo of the Nelson Mandela Google Doodle:
Here is the video behind the Nelson Mandela Google Doodle:
Nelson Mandela was born 96 years ago today and there is really no one here who doesn't know his history. So I won't sum it up here, you can read about it on Wikipedia.
I wouldn't be surprised if Google had an annual Google Doodle for his birthday.
Forum discussion at Google Web Search Help.