Today Is International Day Against Drug Abuse and Illicit Trafficking The International Day Against Drug Abuse and Illicit Trafficking is a United Nations International Day Against Drug Abuse and the illegal drug trade. It is observed annually on 26 June, since 1989. The date June 26 is to commemorate Lin Zexu's dismantling of the opium trade in Humen, Guangdong, ending in June 25 1839, just