Day of Remembrance for All Victims of Chemical Warfare – November 30
On November 11, 2005, the UN Officially recognized the Day of Remembrance for All Victims of Chemical Warfare. The day originally commemorated the date the Chemical Weapons Convention entered into force on April 29, 1997. However, in 2015, the International Day for the Foundation of the Organization for the Prohibition of Chemical Weapons Day was established on April 29th as well. The UN changed the observance for the Day of Remembrance to November 30th.