International Dark Sky Week is a global celebration dedicated to protecting the night from light pollution and reconnecting people with the stars. Organized by DarkSky International, the event takes place each April during the week of the new moon, when skies are naturally darkest. Communities, schools, astronomers, and environmental groups participate by hosting star parties, educational programs, and lighting awareness campaigns that highlight how excessive artificial light impacts wildlife, human health, energy use, and our view of the universe. At its heart, International Dark Sky Week is about encouraging responsible outdoor lighting and inspiring people to step outside, look up, and rediscover the beauty of a truly dark night sky.

https://idsw.darksky.org/