I love the idea of holidays in campaign settings. They’re a lovely background element that seldom come up. Holidays allow a break in the tone of the campaign and cast the setting in a very different light.

Halloween is especially fun being two very different holidays at once. There’s the masque element of costume and treats (and tricks), and then there is the Day of the Dead aspect. Both holidays are excellent sources of adventure ideas. And they’re just a lot of fun.