premise: The Africa Cup of Nations is held in even-numbered years.
hypothesis: The Africa Cup of Nations , officially CAN ( Coupe d'Afrique des Nations ) , also referred to as African Cup of Nations , or AFCON , is the main international association football competition in Africa . It is sanctioned by the Confederation of African Football ( CAF ) , and was first held in 1957 . Since 1968 , it has been held every two years . As of 2013 , the tournament was switched to being held in odd-numbered years so as not to clash with the FIFA World Cup .