Stranger Things creators the Duffer Brothers have confirmed that have gone back and re-edited past episodes of the show.The revelation came in a recent interview with the pair, where they admitted they made a mistake in season four by establishing Will Byers’s birthday in May, despite being previously established on the show as March 22.Speaking to Variety, Matt Duffer suggested they will go back and change the season two episode where the birthday was noted as March, as “‘May’ can fit in Winona’s mouth. So that would be us George Lucas-ing the situation.”Matt went on: “We have George Lucas’d things also that people don’t know about,” Ross adding: “You do have the physical copies though, the Blu-rays and stuff — you’d have to compare.”The latter also suggested they had changed elements to season four, volume one after it had already been released, saying: “Some of the visual effects.