Politically, it was a breakthrough month for the Labour leader.
As the results came through on the morning of 9 June it was clear that Corbyn had pulled off an incredible coup, securing 40 per cent of the general election vote for Labour, and increasing his number of MPs.
On the Andrew Marr show the following Sunday, Corbyn looked relaxed and confident, arguably 'Prime Ministerial' for the first time. He performed well in the aftermath of the awful Grenfell Tower tragedy in mid-June, displaying the authentic warmth and anger that Theresa May failed to demonstrate.
But it was at Glastonbury that Corbyn has his greatest 'moment' so far.
Looking somewhat surprised to be on the Pyramid Stage at 4pm on Saturday afternoon, at organiser Michael Eavis' invitation, the 68-year-old soon warmed to his task.
His speech, clearly jotted down on the drive to Somerset, was not slick. But it was passionate, hitting all the right notes for the 200,000 Glasto faithful gathered in front of him, and the millions of youngsters watching the BBC coverage.
With the chant 'Ohh Jere-my Cor-byn' spontaneously breaking out throughout the weekend, even during Radiohead’s set, he must have felt like a true headliner at last.