So this is one Hellenic holiday that I don’t personally honor. This is connected to the gods Zeus and Hermes. Zeus under the title Zeus Meilikhios (Kindly). The rule is that you don’t have to celebrate all the Hellenic holidays that are celebrated. Personally, the idea would drive me mad. You burn incense and pour out libations of wine. I hope that, for those that do celebrate Pompaia, that you have a good one.