From their website:

“Asteroid Day returns to Luxembourg on 26 and 27 June 2026 with a public programme dedicated to space, asteroids, science and inspiring encounters. This year’s programme will invite audiences to discover the night sky, meet space experts and astronauts, and explore how the study of asteroids helps us better understand our Solar System and our planet.

The events are open to the public and hosted in Luxembourg, with the Asteroid Day Festival taking place at Cercle Cité. Selected sessions will also be live-streamed on Asteroid Day’s digital platforms.

Join us for Astronomer for a Night on 26 June and the Asteroid Day Festival on 27 June.”