A performance of Olivier Messiaen’s kaleidoscopic Turangalîla-Symphonie is always going to be a bit of an event. The Edinburgh International Festival set this one up nicely by making it not only the impressive culmination of a four-concert residency by the London Symphony Orchestra, but also the centrepiece of a group of Messiaen-themed performances.

Before the not-quite-clear all-clear was given for distanced performances indoors, Bold Tendencies already had the perfect summer solution in the floor space beneath its rooftop terrace in Peckham’s former multi-storey car park.

There were two immediate casualties at Pierre-Laurent Aimard’s high-energy account of Messiaen’s monumental Des canyons aux étoiles… with the Scottish Chamber Orchestra at the Edinburgh International Festival.

Anyone passionate about great conducting would jump at the chance to hear 89-year-old Bernard Haitink giving three days of masterclasses with eight young practitioners of the art, his eighth and possibly last series in Lucerne (though he's not ruling anything out). That was the hook to visit this year's Easter Festival.

Only connect.

The Paris-based Ensemble InterContemporain brought a wide-ranging programme to the Wigmore Hall.

Two works whose whole significance depends on (unspoken) sacred texts made a stimulating combination for a concert in Manchester Cathedral’s sacred space. Haydn’s The Seven Last Words of our Saviour on the Cross – usually heard in its string quartet version – is an instrumental version of Christ's words from the Gospels’ descriptions of the Passion.

Visions de l’Amen was a shoo-in for Belief and Beyond Belief, the year-long festival of art inspired by religious faith. The festival’s goals seem dangerously nebulous – almost anything could fit its remit – but it is hard to imagine a work that better encapsulates "The Search for the Meaning of Life" than Messiaen’s transcendental masterpiece.

"He is one of the few pianists who will not make them sound like angry birds," said young pianist-animateur Víkingur Ólafsson in Reykjavík when I told him that in little over 24 hours' time I'd be hearing Pierre-Laurent Aimard work his way through Messiaen's Catalogue d'Oiseaux at dawn, in the afternoon and evening and close to midnight at the Aldeburgh Festival.

Exactly what constitutes “the End of Time” in Olivier Messiaen’s extraordinary Quartet for piano, violin, cello and clarinet? Not surely “the end of days” but rather the end of measured time; music unfettered, music of the spheres, music without frontiers.