There are quite a few sacred holidays and seasons. I recommended The Pagan Book of Days to another person as well. It gives a lot of useful information on celebrations, moon cycles, and other events. As for prayers I really don’t do those personally as much as I do rituals. Rituals can be performed during certain moon phases for different effects and boosts as well as different times. I’m a witch as well, so that’s why the moon phases and times are especially important for me. I hope this was helpful