The Tamil calendar is a sidereal Hindu calendar used by the Tamil people of the Indian subcontinent. It is also used in Puducherry, and by the Tamil population in Malaysia, Singapore, Mauritius and Sri Lanka. Tamil Nadu farmers greatly refer to this. It is used today for cultural, religious and agricultural events, with the Gregorian calendar largely used for official purposes both within and outside India. The Tamil calendar is based on the classical Hindu solar calendar also used in Assam, West Bengal, Kerala, Manipur, Nepal, Odisha, Rajasthan and Punjab.
There are several festivals based on the Tamil calendar. The Tamil New Year follows the nirayanam vernal equinox and generally falls on 14 April of the Gregorian year. 14 April marks the first day of the traditional Tamil calendar and this remains a public holiday in Tamil Nadu, Sri Lanka and Mauritius. Tropical vernal equinox fall around 22 March, and adding 23 degrees of trepidation or oscillation to it, we get the Hindu sidereal or Nirayana Mesha Sankranti (Sun's transition into nirayana Aries). Hence, the Tamil calendar begins on the same date in April which is observed by most traditional calendars of the rest of India - Assam, Bengal, Kerala, Odisha, Manipur, Punjab etc. This also coincides with the traditional new year in Burma, Cambodia, Laos, Sri Lanka, Bangladesh Nepal and Thailand. The 60-year cycle is also very ancient and is observed by most traditional calendars of India and China, and is related to 5 revolutions of Jupiter according to popular belief, or to 60-year orbit of Nakshatras (stars) as mentioned in Surya Siddhanta.
The traditional Tamil year starts on 14 April 2019, Kaliyuga 5121. Vikrama and Shalivahana Saka eras are also used. There are several references in early Tamil literature to the April new year. Nakkirar, Sangam period author of the Ne?unalvai, wrote in the third century CE that the sun travels each year from Mesha/Chitterai in mid-April through 11 successive signs of the zodiac. K?dal?r Kizhaar in the third century CE refers to Mesha Raasi/Chitterai i.e. mid-April as the commencement of the year in the Pu?an?u. The Tolkaapiyam is the oldest surviving Tamil grammar that divides the year into six seasons where Chitterai i.e. mid-April marks the start of the Ilavenil season or summer. The 8th century Silappadikaaram mentions the 12 Raasis or zodiac signs that correspond to the Tamil months starting with Mesha/Chitterai in mid-April. The Manimekalai alludes to this very same Hindu solar calendar as we know it today Adiyarkunalaar, an early medieval commentator or Urai-asiriyar mentions the twelve months of the Tamil calendar with particular reference to Chitterai i.e. mid-April. There were subsequent inscriptional references in Pagan, Burma dated to the 11th century CE and in Sukhothai, Thailand dated to the 14th century CE to South Indian, often Vaishnavite, courtiers who were tasked with defining the traditional calendar that began in mid-April.
This list compiles the days of the week in the Tamil calendar:
|No.||Kizhamai (Tamil)||Weekday (Transliteration)||Vaasara (Sanskrit)||Lord or Planet||Gregorian Calendar equivalent|
|3.||Chevvai-kizhamai||Mangala-vaasara||Mars (, Red Planet)||Tuesday|
For Tamils, each day begins at the sun rise.
The number of days in a month varies between 29 and 32.
The following list compiles the months of the Tamil Calendar.
|No.||Month (Tamil)||Month (Transliteration)||Sanskrit Name *||Gregorian Calendar equivalent|
|01.||Cittirai||Chaitra||mid-April to mid-May|
|02.||Vaik?si||Vais?kha||mid-May to mid-June|
|03.||?ni||Jyaishtha||mid-June to mid-July|
|04.||?di||?shha||mid-July to mid-August|
|05.||?||?va?i||Shr?va?a||mid-August to mid-September|
|06.||Purasi||Bh?drapada/Prauhapada||mid-September to mid-October|
|07.||Aippasi||Ashwina/Ashvayuja||mid-October to mid-November|
|08.||?||K?rttikai||K?rttika||mid-November to mid-December|
|09.||?||M?rkazhi||M?rgar?a||mid-December to mid-January|
|10.||Tai||Pausha/Tai?ya||mid-January to mid-February|
|11.||?||M?si||M?gha||mid-February to mid-March|
|12.||?||Pa?kuni||Phalguna||mid-March to mid-April|
The Tamil year, in keeping with the old Indic calendar, is divided into six seasons, each of which lasts two months:
|Season in Tamil||Transliteration||English Translation||Season in Sanskrit||Season in English||Tamil Months||Gregorian Months|
|ila-venil||Light warmth||Vasanta||Spring||chithirai, vaig?si||Mid Apr - Mid Jun|
|?||mutu-venil||Harsh warmth||Grishma||Summer||?ni, ?di||Mid Jun - Mid Aug|
|?||kaar||Dark clouds, Rain||Varsha||Monsoon||?vani, purat?ci||Mid Aug - Mid Oct|
|koothir||Chill / Cold||Sharada||Autumn||aippasi, k?rthigai||Mid Oct - Mid Dec|
|?||mun-pani||Early mist / dew||Hemanta||Winter||m?rkazhi, tai||Mid Dec - Mid Feb|
|?||pin-pani||Late mist / dew||Sishira||Prevernal||m?si, panguni||Mid Feb - Mid Apr|
The 60-year cycle is common to both North and South Indian traditional calendars, with the same name and sequence of years. Its earliest reference is to be found in Surya Siddhanta, which Varahamihirar (550 CE) believed to be the most accurate of the then current theories of astronomy. However, in the Surya Siddhantic list, the first year was Vijaya and not Prabhava as currently used. There are some parallels in this sexagenary cycle with the Chinese calendar. The Surya Siddhanta and other Indian classical texts on astronomy had some influence on the Chinese calendar although it merits attention that the sexagenary cycle in China is itself very old.
After the completion of sixty years, the calendar starts a new with the first year. This corresponds to the Hindu "century." The Vakya or Tirukannitha Panchangam (the traditional Tamil almanac) outlines this sequence. It is related to the position of the planets in the sky with respect to earth. It means that the two major planets Sani/Saturn (which takes 30 years to complete one cycle round the sun) and the Viyazhan/Jupiter (which takes 12 years to complete one cycle round the Sun) comes to the same position after 60 years.
The following list presents the current 60-year cycle of the Tamil calendar:
|No.||Name||Name (English)||Gregorian Year||No.||Name||Name (English)||Gregorian Year|
The months of the Tamil Calendar have great significance and are deeply rooted in the faith of the Tamil Hindus. Some months are considered very auspicious while a few are considered inauspicious as well. Tamil months start and end based on the Sun's shift from one Rasi to the other but the names of the months are based on the star on the start of Pournami in that month. The name of the month is some times the name of the star itself. (e.g. Chithrai is always the star on the Pournami of the Chithirai month).
Some of the celebrations for each month are listed below. Dates in parentheses are not exact and usually vary by a day or two. Underneath (or beside) the months of the Hindu calendar are their Gregorian counterparts.
|- Chithirai||14 April - 13 May||Star on the Pournami: Chithirai. Chitra Pournami & Varusha pirappu are the most important festivals in this month. Famous Chithirai Thiruvizha is celebrated in Madurai Meenakshi Amman temple. 14 April is the Tamil New Year.|
|- Vaikaasi||14 May - 14 June||Star on the Pournami: Visaagam. Vaikaasi Visaakam is the most important day in this month.This month is most favorable month of Lord Subramainya (Murga Kadavul). Thirumangalam[Madurai] Shri Pathrakali Mariamman Temple 13day Vaigasi Festival starts at Sunday followed by vaigasi ammavasai[no moon day].|
|- Aani||15 June - 15 July||Star on the Pournami: Anusham. Aani Thirumanjanam or Aani Uttaram for Lord Nataraja is the most famous day in this month.|
|- Aadi||16 July - 16 August||Star on the Pournami: Pooraadam (or) Uthiraadam. A most important month for women. The most auspicious days are Fridays and Tuesdays in this month, these are called Aadi Velli and Aadi Chevvai and the Aadi Amavasya. Aadi Pooram is also a special day.18th day of adi is the most important day for the farmers (delta region) they prepare paddy seedlings.during this month "kanchi varthal" is famous in amman temples|
|? - Aavani||17 August - 16 September||Star on the Pournami: Thiruvonam. An important month with many rituals. Brahmins change their sacred thread on Aavani Avittam. Each Sunday of the month is dedicated to prayers - Aavani Gnayiru.vinayaka chaturthi ,the festival of lord ganesha is held in this month|
|- Purattaasi||17 September - 16 October||Star on the Pournami: Poorattathi (or) Uthirattathi. An important month for Vaishnavas. Purattaasi Sani(Saturday) is an auspicious day for Lord Vishnu. Navarathri & Vijayadhashami or Ayuda Pooja is celebrated to invoke Goddess Durga, Lakshmi and Saraswathi.|
|- Aippasi||17 October - 15 November||Star on the Pournami: Ashwini. The monsoons typically start over Tamil Nadu in this month. Hence the saying, "Aippasi Mazhai, adai mazhai" - meaning "Aippasi rains are persistent rains".
Also Annaabishekam for Lord Shiva is very famous in this month. The most famous Hindu festival "Deepavali" is celebrated in this month. The Fridays of this month - Aipassi velli - are dedicated to religious observance.
|? - Karthikai||16 November - 15 December||Star on the Pournami: Karthikai. Another auspicious celebration for Shiva devotees is Thirukaarthigai. The Krithikaa Pournami is the special day of the full moon in the month of Kaarthikai, and the star is Krithikaa.
Each Monday of this month is dedicated to the worship of Lord Shiva. Every Monday is called "Somavaaram" when 108 or 1008 sangabhishekam are offered to Lord Shiva and Lord Muruga.
|? - Maargazhi||16 December - 13 January||Star on the Pournami: Mrigasheersham. This is another special month in the Tamil Calendar. Temples open earlier in the mornings and Devotees throng the temples early for puja and prasadam - the offering made to the deity which is later distributed to the devotees. Arudra Darisanam (Thiruvaadirai star in Tamil) is the most auspicious day in this month. The offering made to Lord Siva is the Thiruvaadirai Kali - a sweet boiled pudding. Mukkodi Ekathesi is called "Paramapadha vaasal Thirappu" for Lord Vishnu. The Tiruvembaavai and Thirupaavai fast takes place in this month.|
|- Thai||14 January - 12 February||Star on the Pournami: Poosam. Pongal, which is the Tamil harvest festival, is celebrated on the first day of this month. Thaipusam is also a special day for Murugan devotees, who carry Kavadi to one of the Aarupadaiveedu (Literally meaning "six abodes").|
|? - Maasi||13 February - 13 March||Star on the Pournami: Magam. Maasi Magam is the special day of which comes in this Month. Shivaratri is an important festival widely celebrated by Hindus in this month.|
|? - Panguni||14 March - 13 April||Star on the Pournami: Uththiram. Panguni Uthiram, the last month of the year, is a famous festival and special to Murugan and Siva devotees.|
The Tamil Calendar is important in the life of Tamil-speaking people and most Festivals of Tamil Nadu are based on it. Some Festivals include Tamil New Year (also called Puthandu) in mid-April, Thai Pongal, Deepavali, Panguni Uthiram, Thirukaarthigai, Aadiperukku, Navaratri etc. One day was even dedicated to a celebration of the Tamil alphabet and was called "ezhuthu naal'.