Events being held to celebrate the occasion include the Anniversary Run, which took place on 21 July and saw more than 12,500 members of the public complete an 8km course around the newly-reopened Queen Elizabeth Olympic Park – the first public sports event to be held on the site since the conclusion of London 2012.
The 8km route crossed the Olympic Park's wetlands and looped around the Velodrome before finishing in the Olympic Stadium.
Other anniversary events include the Open East Festival – a weekend of music food, theatre and family fun, taking place in the Olympic Park on 27 and 28 July.
“Open East Festival is one of a fantastic series of events this summer and marks the start of the first phase of opening for Queen Elizabeth Olympic Park,” said Dennis Hone, Chief Executive of the London Legacy Development Corporation, which is responsible for the long-term planning, development, management and maintenance of the Olympic Park and its facilities.
“It’s a wonderfully varied event for families and friends and we can’t wait to welcome local people back in to the Park and deliver something truly magical for Londoners.”
Many London 2012 Olympic medallists are also returning to the Olympic Stadium to compete in the Anniversary Games, which run from 26-28 July.
The special three-day athletics grand prix incorporates the London leg of the IAAF Diamond League series, as well as a day of competition for Paralympic athletes.
Tickets for the event sold out in just 75 minutes when they went on sale in April, underlining the sporting legacy created by the London 2012 Games, which aimed to “Inspire a Generation”.
“London 2012 was an amazing year for British sport and what a way to celebrate its success by welcoming the world back to London once more to watch the biggest names in athletics,” said former London 2012 chairman Seb Coe. “It is an important part of the London 2012 legacy that as many people as possible experience world class sport in the world class facilities at Queen Elizabeth Olympic Park and I’m sure the London Anniversary Games will go a long way to inspiring the next generation of track and field fans.”