Permanent Day shift (other shifts also available. (cv-library.co.uk)
It's probably tidally locked, meaning that it always presents the same face to the star, resulting in permanent day and night sides with huge differences in temperature. (sciencemag.org)
This not only causes one hemisphere to experience permanent day and the other to reside in permanent night (with perpetual twilight along the «terminator» at the edges), but this also drives the climate into a regime fundamentally unlike any seen in the atmosphere of Earth. (haqqmisra.net)