There are plenty of things that only happen at certain times of the year. People care about going from place to place. This could be as simple as knowing how to drive or operate special machinery. It could involve dimensional travel, time travel, or teleportation, or easier, quicker ways of traveling through specific areas or types of area. They want the key to spawning faster and more reliably, or turning others into creatures just like themselves.
People like to enjoy, create, and destroy buildings and works of beauty.
People want easy answers to their relationships with other people. They want to know what others think of them, and they want to make people like them. Light and shadow are heavy themes in many powers. Causing light, banishing shadows, cloaking something in shadows, and so on. When you need inspiration for specifics I recommend several methods, which you may have heard me espouse before.