There is an excellent resource for the Hindu Calendar called the Panchangam. The following information is obtained from the My Panchang site @
www.mypanchang.com
"Panchangam means five attributes of Hindu calendar day that is Tithi, Vaar, Nakshatra, Yoga, and Karana. It is the official astrological calendar of practicing Hindus. It forecasts celestial phenomena such as solar eclipses as well as more mundane occurrences. The study of Panchangam involves understanding Rasi phala, the impact of the signs of the zodiac on the individual. Astrologers consult the Panchangam to set dates for weddings, corporate mergers, and other worldly activities. These panchangam elements are same across all panchangam -- Tamil panchangam, Telugu panchangam, Malayalam panchangam, and Hindi, Gujarati, Marathi, Punjabi, and other panchangam. What is different is how they threat their months/year. Solar months and their starting rules and luni-solar moths. Tamil, Malayalam, Bengali uses solar months and the rules on how month start is determined is different, but rest of information remains same. Panchangam is important part of the Hindu Calendar. The word panchang is derived from the Sanskrit panchangam (pancha, five; anga, limb), which refers to the five limbs of the calendar: Vaara, Month and Tithi, Nakshatra, yoga, karana. The panchangam may also includes details about Rahu kalam, Yamagandam, Gulika Kalam, Durmuhurtham, Varjyam, Lagna Pravesh tables, daily planetory transists, and other information. The panchangam presented on this website contains enough information for people following different panchangam and they are available for diffferent places in the world. "
www.mypanchang.com
"Panchangam means five attributes of Hindu calendar day that is Tithi, Vaar, Nakshatra, Yoga, and Karana. It is the official astrological calendar of practicing Hindus. It forecasts celestial phenomena such as solar eclipses as well as more mundane occurrences. The study of Panchangam involves understanding Rasi phala, the impact of the signs of the zodiac on the individual. Astrologers consult the Panchangam to set dates for weddings, corporate mergers, and other worldly activities. These panchangam elements are same across all panchangam -- Tamil panchangam, Telugu panchangam, Malayalam panchangam, and Hindi, Gujarati, Marathi, Punjabi, and other panchangam. What is different is how they threat their months/year. Solar months and their starting rules and luni-solar moths. Tamil, Malayalam, Bengali uses solar months and the rules on how month start is determined is different, but rest of information remains same. Panchangam is important part of the Hindu Calendar. The word panchang is derived from the Sanskrit panchangam (pancha, five; anga, limb), which refers to the five limbs of the calendar: Vaara, Month and Tithi, Nakshatra, yoga, karana. The panchangam may also includes details about Rahu kalam, Yamagandam, Gulika Kalam, Durmuhurtham, Varjyam, Lagna Pravesh tables, daily planetory transists, and other information. The panchangam presented on this website contains enough information for people following different panchangam and they are available for diffferent places in the world. "