Every year millions of people around the globe celebrate World Kidney Day on the second Thursday in March. This awareness day was started in 2006 and since then it's popularity hasn't stopped growing.
Tibetan Uprising Day is held annually on March 10. It is observed mainly by individuals and organizations who support the independence of Tibet.
International Day of Awesomeness is an informal holiday celebrated annually on March 10. It coincides with the birthday of Chuck Norris, and that is actually not a coincidence at all.