International Boxing Day is observed worldwide every August 27, celebrating the sport of boxing. This international observance was inaugurated in 2018 by the International Boxing Association (AIBA) and aims to encourage athletes, boxing fans, and relevant organizations to promote the sport. Originally celebrated on July 22 to coincide with Russia's National Boxing Day, the date was moved to August 27 to commemorate the first AIBA World Boxing Championships held in Havana in 1974. The AIBA, which unites 195 national boxing associations, organizes various boxing events, including the World Championships and Olympic tournaments. Celebrations are particularly prominent in Russia, where significant events have included mass boxing practices and competitions, such as a notable gathering in Red Square in 2017 that set a Guinness World Record for the largest simultaneous boxing practice.