Over the last two years, a collective of composers, musicians, computer programmers, scientists and activists has set out to reinterpret Vivaldi's "The Four Seasons" for a transformed world, restituting Vivaldi's score in expected climate scenarios for the year 2050. The project, titled "The [Uncertain] Four Seasons," launches November 5, 2021, which will be Youth Day at the UN climate conference COP26, with fifteen orchestras from around the world performing a localized variation during a global live-streaming event.