The purpose of the IARU is to monitor the interests of the Amateur Radio community worldwide. Each year WARD has a different theme. In 2014 the theme is “Amateur Radio: Your Gateway to Wireless Communication.”
Every one of the 150 countries within the IARU has a Member Society. For the US, the Member Society is the ARRL. Clubs worldwide that are associated with their Member Societies are on the air with their special event stations to celebrate WARD.
Find out more about the IARU here.