 A religious festival held on a single day, such as the Floralia, might be expanded with games over multiple days "(Ludi Florae)"; the festival of Flora is seen as a precursor of May Day festivities.A major source for Roman holidays is Ovid's "Fasti", a poem that describes and provides origins for festivals from January to June at the time of Augustus.Because it ends with June, less is known about Roman festivals in the second half of the year, with the exception of the Saturnalia, a religious festival in honor of Saturn on December 17 that expanded with celebrations through December 23.