Hindon Air Force Station (Hindon AFS) (also Hindan) is an Indian Air Force base under the Western Air Command (WAC). It is the biggest and largest air base in Asia and 8th in the world. Its area measured 14 km rounded and 55 square kilometres (21 sq mi). This base celebrates Air Force Day on 8 October. It is located near Loni Ghaziabad in the state of Uttar Pradesh in the National Capital Region on the outskirts of Delhi, close to the Hindon River. Starting 2006, the annual Air Force Day Parade venue was shifted from Palam Airport to Hindon.