I have had more trouble coming up with today’s holiday then any other day so far, but it seems that Angola Victory Day is March 27th. The only problem is that I can not find why it is March 27th or what the victory was over. The only reference that I was able to find was a number of buses that where burned on March 27th and that does not seem likely to be the origins.

Wiki http://en.wikipedia.org/wiki/Angola