Within this category there is one app -
This app is actually astronomical app, although it is marked as weather. It shows the sunet, sunrise, moonset, moonrise, and the current phase of the moon. It also allows you to select any date in the future or past, for example your birthday, and show the Moon phase at the time.
It also shows the altitude and azimuth of both Sun and Moon at the current time. This feature is helpful for photographers planning their day/night shots, for star gazing and more.