Peter Gabriel is releasing music on a lunar schedule through his project o\i.

The Genesis legend dropped another track from o\i on May 31, during the blue moon. The song is "A Hard Lesson" — a track with roots stretching back decades.

Gabriel revealed that this song dates to the late Eighties or early Nineties. He wrote it while in Senegal, drawing from the music around him. "I was falling in love with the music I heard there," he explained on his website. "I loved the tension created by the use of polyrhythms, particularly the threes and fours, so that was the start of this song."

The result is characteristically Gabriel — layered with old R&B and folk references woven into polyrhythmic structures about finding your place in the world. It's less pop song than meditative piece.

Gabriel's release strategy mirrors his 2023 album i/o: he is unfurling o\i throughout 2026 with a new track dropping every full moon until the full album arrives. This approach stands apart from the streaming era's compressed release cycles.

Fans are parsing the polyrhythmic details. Gabriel has delivered a song written three decades ago, and it is generating the kind of scrutiny that few artists can command.