Carnival Week was an annual week-long celebration on Coruscant. It is unknown when the tradition began, but during the reign of Palpatine it grew to become an outlandish event that included military parades, orbital fireworks displays and public executions of the Emperor's political enemies. The celebration drew an exceptional number of offworlders to Coruscant and was an event Imperial citizens saved their credits for all year.
Its persistence after Palpatine's death is unknown.