What is the significance of the date 2 June 1953?

In London a moment of historic pageantry was the famous Sherpa porter from Nepal. The London Times wrote:

‘Seldom since Francis Drake brought the Golden Hind to anchor in Plymouth Sound has a British explorer offered to his Sovereign such a tribute of glory as Colonel John Hunt and his men are able to lay at the feet of queen Elizabeth for her Coronation day. The Queen sent a message to the Everest expedition expressing her ‘warmest congratulations on (their) great achievement’.