There are numerous days throughout the year celebrated asNew Year's Day in the different regions of India. The observance is determined by whether thelunar,solar orlunisolar calendar is being followed. For those regions which follow the solar calendar, the new year falls as Chet in Punjab,Bohag Bihu inAssam, Puthandu in Tamil Nadu,Vishu in Kerala,Pana Sankranti or Odia Nababarsa in Odisha andPoila Boishakh in Bengal in the month of the calendar, i.e.,Vaishakha. Generally, this day falls during 14th or 15th of the month ofApril. Those following the lunar calendar consider the month ofChaitra (corresponding toMarch-April) as the first month of the year, so the new year is celebrated on the first day of this month likeUgadi in Andhra Pradesh, Telangana,Karnataka andGudi Padwa in Maharashtra. Similarly, few regions in India consider the period between consecutiveSankarantis as one month and few others take the period between consecutivePurnimas as a month. In Gujarat the new year is celebrated as the day afterDiwali. As per the Hindu Calendar, it falls on Shukla Paksha Pratipada in the Hindu month of Kartik. As per the Indian Calendar based on the lunar cycle, Kartik is the first month of the year and the New Year in Gujarat falls on the first bright day of Kartik (Ekam). In other parts of India, New Year celebrations begin in the spring.