Carnaval de Las Tablas in Las Tablas
Las Tablas turns into Panama's carnival capital for the four days before Ash Wednesday, when the rival neighborhoods of Calle Arriba and Calle Abajo each crown a queen and compete with parade floats, live tunas, fireworks and daytime water-truck soakings called culecos, closing with a dawn fireworks duel and a mock funeral for the sardine on Ash Wednesday morning.
Panama's carnival calendar has one fixed point and one moving one: it always runs Friday through Tuesday, and it always lands on the four days before Ash Wednesday, so the dates shift with the church calendar every year.