Complex sentence: The festival is held during Kartik Purnima in October and November, for a period of five days right before the full moon, a period that was considered auspicious by the Sadhabas to begin their voyage in sailing ships called Boitas.
Split into simpler sentences: The festival is held during Kartik Purnima in October and November, for a period of five days right before the full moon. This time was considered auspicious by the Sadhabas to begin their voyage in vessels called Boitas.