Depends on where you are in the world. Mildmay's got completely different answers from me.

My part of the world, we worship a goddess we just call the Lady. She's most closely associated with the sea and mazes and the afterlife. Vax put an alcove to her in the Temple so I could pray.

Holidays... midsummer, midwinter, the arrival of Agramant the Navigator (our country's founder, according to legend), the end of the line of kings, the anniversary of the unification between Corambis and Caloxa (Caloxa's still pissed), new year (spring equinox, I don't get this whatever day in winter business)... I'm sure I'm forgetting something but that's what I got off the top of my head.