Navarātri (Tam. Navarāttiri) is one of the most popular and important annual festivals in the south Indian city of Madurai. The same is true elsewhere in the state and, in somewhat different forms, the festival is also popular in many other regions of India, notably Bengal (where it is known as Durgā Pūjā) and Karnataka (where it is called Dasarā). Navarātri means ‘nine nights’ and throughout India the festival is celebrated on the first nine lunar days (tithi) of the bright fortnight (i.e. the fortnight ending on full moon) of the lunar month of āśvina. In the Tamil calendar, however, the year is divided into twelve solar months and Navarātri is said to occupy the nine lunar days beginning with the day after new moon in the solar month of puraṭṭāci (September-October). Very occasionally, the Tamil formula may supply the wrong date. In many years, the festival only lasts eight weekdays, as two lunar days may fall within one weekday. (In some parts of India, a Navarātri festival is celebrated in the spring, but that is not discussed here.)