What year did the anime "Himouto! Umaru-chan" air?

Himouto! Umaru-chan, an anime television series, aired in 2015. The show follows the daily life of Umaru Doma, a high school student who turns into a lazy, bratty, and spoiled otaku at home, while putting on a perfect facade outside. With its humor and relatable characters, the series quickly gained popularity among anime enthusiasts, making 2015 the year it initially aired.