With such a multiplicity of ethnic groups, Indonesia has, unsurprisingly, a surfeit of cultural events throughout the year. On Sumba, mock battles that hark back to the era of internecine warfare are held in February and March. The day before Balinese Caka New Year (March-April) temple icons are taken to the sea to be bathed and drummers drive evil spirits back to the spirit world. During the Balinese festival of Galungan (moving dates) even the gods descend to earth and join in the revelry. There's a dramatic Easter Parade on the island of Larantuka, whip duels in Ruteng, Flores in August and Torajan funereal feasts are held in central Sulawesi, mainly between August and October. As most Indonesians are Muslim, many festivals are affected by the lunar calendar; dates are subsequently pushed back 10 or 11 days each year.