International observances (December): December[edit] December 1 –World AIDS Day, recognized by the UN[3][122] December 2 –International Day for the Abolition of Slavery, recognized by the UN[3][123] December 3 –International Day of Persons with Disabilities, recognized by the UN[3][124] December 5 –International Volunteer Day for Economic and Social Development, recognized by the UN[3][125] December 7 –International Civil Aviation Day, recognized by the UN and ICAO[3][126] December 9 –International Anti-Corruption Day, recognized by the UN[3][127] December 10 –Human Rights Day, recognized by the UN[3][128] December 10 – International Animal Rights Day, founded in 1998 by Uncaged Campaigns[129] December 11 –International Mountain Day, recognized by the UN[3][130] December 12 –The International Day Of Heavy Metal, a celebration of Heavy Metal&Hard Rock Music[131][132][133][134] December 18 –International Migrants Day, recognized by the UN[3][135] December 20 –International Human Solidarity Day, recognized by the UN[3][136]