The Tamil calendar is a sidereal solar calendar used by the Tamil people. [1] [2] It is used in the Indian subcontinent, and other countries with significant Tamil population like Sri Lanka, Malaysia, Singapore, Myanmar and Mauritius. It is used in contemporary times for cultural, religious and agricultural events, with the Gregorian calendar largely used for official purposes. [3]
There are several references to the calendar in early Tamil literature. Nakkeerar, the Sangam period author of the Neṭunalvāṭai , wrote in the third century CE that the Sun travels each year from Mesha/Chittirai in mid-April through 11 successive signs of the zodiac. [4] The same is referenced to by Kūdalūr Kiḻar in Puṟanāṉūṟu . [5] [6] Tolkappiyam , the oldest surviving Tamil grammar text, divides the year into six seasons and Chittirai marks the start of the "ilavenil" (summer) season. [7] The fifth century CE treatise of Cilappatikaram mentions the 12 rāśis (zodiac signs) that correspond to the Tamil months. [8] The sixth century epic Manimekalai alludes to this to thhe Hindu solar calendar. [9]
Inscriptional evidences from Pagan in Myanmar from the 11th century CE and in Sukhothai in Thailand from the 14th century CE point to South Indian courtiers being tasked with defining the traditional calendar that followed a similar cycle. [10] [11]
The Tamil calendar is based on the Hindu system of calendrics that was used to calculate date and time. [12] The Tirukkanida Panchanga derived from astronomical data is used as a basis for the same. [13] The calendar is similar to traditional calendars followed in other parts of the Indian subcontinent, and Southeast Asia. [14]
The Tamil calendar follows a 60-year cycle similar to the other traditional calendars of India. [15] The Tamil New Year follows the Nirayana system , and usually falls on 13 or 14 April in the Gregorian year. [16] The new year starts on the date arrived by adding the days corresponding to the 23 degrees of trepidation (oscillation) to the vernal equinox, when the Sun begins its transition as per the Hindu sidereal calendar. [17] [ page needed ] A Tamil calendar year might consist of 365 or 366 days in a year. [18]
The 60-year cycle is common to Hindu traditional calendars, with similar names and sequence of years. The earliest reference of the same is in Surya Siddhanta , dated between 4th and 9th century CE. There are parallels to the sexagenary cycle used in the Chinese calendar, [19] [20] [21] though which influenced the other has been subject to debate. [22]
After the completion of a cycle of sixty years, the calendar re-starts with the first year of a new cycle. [23] As per the Hindu Panchangam , it represents the year in which Shani Saturn (which takes 30 years to complete one cycle round the Sun) and Vyalan (Jupiter) (which takes 12 years to complete one cycle round the Sun) come to a same position after 60 years. [24] [25]
The following list presents the current 60-year cycle of the Tamil calendar: [26]
| No. | Name | Transliteration | Gregorian Year | No. | Name | Transliteration | Gregorian Year | |
|---|---|---|---|---|---|---|---|---|
| 01. | பிரபவ | Prabhāva | 1987–1988 | 31. | ஹேவிளம்பி | Hēvilaṃbi | 2017–2018 | |
| 02. | விபவ | Vibhāva | 1988–1989 | 32. | விளம்பி | Vilaṃbi | 2018–2019 | |
| 03. | சுக்ல | Śuklā | 1989–1990 | 33. | விகாரி | Vikāri | 2019–2020 | |
| 04. | பிரமோதூத | Pramadutā | 1990–1991 | 34. | சார்வரி | Śarvarī | 2020–2021 | |
| 05. | பிரசோற்பத்தி | Prachopati | 1991–1992 | 35. | பிலவ | Plava | 2021–2022 | |
| 06. | ஆங்கீரச | Āṅgirasa | 1992–1993 | 36. | சுபகிருது | Śubhakṛt | 2022–2023 | |
| 07. | ஸ்ரீமுக | Śrīmukha | 1993–1994 | 37. | சோபக்ருத் | Śobhakṛt | 2023–2024 | |
| 08. | பவ | Bhava | 1994–1995 | 38. | க்ரோதி | Krodhī | 2024–2025 | |
| 09. | யுவ | Yuva | 1995–1996 | 39. | விசுவாசுவ | Viśvāvasuva | 2025–2026 | |
| 10. | தாது | Dhātu | 1996–1997 | 40. | பரபாவ | Parapāva | 2026–2027 | |
| 11. | ஈஸ்வர | Īśvara | 1997–1998 | 41. | ப்லவங்க | Plavaṅga | 2027–2028 | |
| 12. | வெகுதானிய | Vehudānya | 1998–1999 | 42. | கீலக | Kīlaka | 2028–2029 | |
| 13. | பிரமாதி | Pramāti | 1999–2000 | 43. | சௌம்ய | Saumya | 2029–2030 | |
| 14. | விக்ரம | Vikrama | 2000–2001 | 44. | சாதாரண | Sādhāraṇa | 2030–2031 | |
| 15. | விஷு | Viṣu | 2001–2002 | 45. | விரோதகிருது | Virodhikṛti | 2031–2032 | |
| 16. | சித்திரபானு | Citrabhānu | 2002–2003 | 46. | பரிதாபி | Paritapi | 2032–2033 | |
| 17. | சுபானு | Subhānu | 2003–2004 | 47. | பிரமாதீச | Pramādīca | 2033–2034 | |
| 18. | தாரண | Dhārana | 2004–2005 | 48. | ஆனந்த | Ānanda | 2034–2035 | |
| 19. | பார்த்திப | Partibhā | 2005–2006 | 49. | ராட்சச | Rākṣasaḥ | 2035–2036 | |
| 20. | விய | Viya | 2006–2007 | 50. | நள | Nala | 2036–2037 | |
| 21. | சர்வஜித் | Sarvajit | 2007–2008 | 51. | பிங்கள | Piṅgāla | 2037–2038 | |
| 22. | சர்வதாரி | Sarvadhārī | 2008–2009 | 52. | காளயுக்தி | Kālayukti | 2038–2039 | |
| 23. | விரோதி | Virodhī | 2009–2010 | 53. | சித்தார்த்தி | Siddhidātrī | 2039–2040 | |
| 24. | விக்ருதி | Vikṛti | 2010–2011 | 54. | ரௌத்திரி | Rautrī | 2040–2041 | |
| 25. | கர | Kara | 2011–2012 | 55. | துன்மதி | Dhūnmatī | 2041–2042 | |
| 26. | நந்தன | Nandhana | 2012–2013 | 56. | துந்துபி | Dundubhi | 2042–2043 | |
| 27. | விஜய | Vijaya | 2013–2014 | 57. | ருத்ரோத்காரி | Rudhirōtgāri | 2043–2044 | |
| 28. | ஜய | Jaya | 2014–2015 | 58. | ரக்தாட்சி | Rākṣasī | 2044–2045 | |
| 29. | மன்மத | Manmatha | 2015–2016 | 59. | க்ரோதன | Krodhanā | 2045–2046 | |
| 30. | துன்முகி | Dhuṇmūkī | 2016–2017 | 60. | அட்சய | Akṣayā | 2046–2047 |
There are twelve months in the Tamil calendar, with 29 to 32 days per month. [27] Tamil months start and end based on the Sun's shift from one rasi to the other, and the names of the months are based on the nakshatra (star) that coincides with the start of the pournami (full moon) in that month. [28] The Tamil calendar month starts a few days after the corresponding Hindu calendar month as the Tamil calendar is a solar calendar, while the other is a lunisolar calendar. [29]
| Month (in Tamil) | English transliteration | Hindu Lunar calendar | Nakshatra | Gregorian calendar | Days |
|---|---|---|---|---|---|
| சித்திரை | Chittirai | Chaitra | Chittirai | April–May | 30–31 |
| வைகாசி | Vaikāsi | Vaisakha | Visakam | May–June | 31–32 |
| ஆனி | Āni | Jyestha | Anusham | June–July | 31–32 |
| ஆடி | Ādi | Asadha | Pooradam or Uthiradam | July–August | 31–32 |
| ஆவணி | Āvaṇi | Shravana | Thiruvonam | August–September | 31–32 |
| புரட்டாசி | Puraṭṭāsi | Bhadrapada | Pooratathi or Uthiratathi | September–October | 30–31 |
| ஐப்பசி | Aippasi | Asvina | Ashvini | October–November | 29–30 |
| கார்த்திகை | Kārtikai | Kartika | Kartikai | November–December | 29–30 |
| மார்கழி | Mārgaḻi | Margashirsha | Mirgashirsham | December–January | 29–30 |
| தை | Tai | Pausha | Pusham | January–February | 29–30 |
| மாசி | Māsi | Magha | Magham | February–March | 29–30 |
| பங்குனி | Panguni | Phalguna | Uttiram | March–April | 30–31 |
A Tamil year is divided into six seasons, each of which lasts two months. [30] [31]
| Season (in Tamil) | English transliteration | English translation | Hindu calendar | Common season | Tamil month(s) | Gregorian month(s) |
|---|---|---|---|---|---|---|
| இளவேனில் | Ila-venil | Light warmth | Vasanta | Spring | Chittirai, Vaikāsi | April–June |
| முதுவேனில் | Mudhu-venil | Harsh warmth | Grishma | Summer | Āni, Ādi | June–August |
| கார் | Kār | Dark clouds | Varsha | Monsoon | Āvaṇi, Puraṭṭāsi | August–October |
| குளிர் | Kulir | Cold | Sharda | Autumn | Aippasi, Kārtikai | October–December |
| முன்பனி | Mun-pani | Early mist | Hemanta | Winter | Mārgaḻi, Thai | December–February |
| பின்பனி | Pin-pani | Late mist | Shishira | Pre-vernal | Māsi, Panguni | February–April |
The days of week (Kiḻamai) in the Tamil calendar relate to the celestial bodies in the Solar System: Sun, Moon, Mars, Mercury, Jupiter, Venus, and Saturn, in that order. A week usually starts with Sunday, and ends in a Saturday. [32] [33]
| Day (in Tamil) | English transliteration | Shaka Calendar | Deity | Celestial body | Gregorian Calendar |
|---|---|---|---|---|---|
| ஞாயிற்றுக்கிழமை | Nyayitru-kiḻamai | Ravivāra | Surya | Sun | Sunday |
| திங்கட்கிழமை | Tingat-kiḻamai | Somavāra | Chandra | Moon | Monday |
| செவ்வாய்க்கிழமை | Chevvai-kiḻamai | Mangalavāra | Mangala | Mars | Tuesday |
| புதன்கிழமை | Budhan-kiḻamai | Budhavāra | Budha | Mercury | Wednesday |
| வியாழக்கிழமை | Vyaḻa-kiḻamai | Guruvāra | Brihaspati | Jupiter | Thursday |
| வெள்ளிக்கிழமை | Velli-kiḻamai | Śukravāra | Shukra | Venus | Friday |
| சனிக்கிழமை | Sani-kiḻamai | Śanivāra | Shani | Saturn | Saturday |
The various days and months of the Tamil Calendar are of specific significance to Tamil Hindus. The Vakiya Panchangam is employed for calculation of sacred days, while the Tirugaṇita Panchangam is employed for astrological calculations. [34]
The months and their significant events and festivals are listed below. [29] [35]
| Month | Events/festivals |
|---|---|
| Chittirai | Chitra Pournami, Meenakshi Tirukalyanam, Puthandu |
| Vaikāsi | Vaikasi Visakam |
| Aani | Aani Thirumanjanam, Mangani |
| Āadi | Chevvai (Tuesdays) and Velli (Fridays) dedicated to Mariamman; Aadi Amavasai, Aadi Perukku, Pooram |
| Āvaṇi | Avani Avittam, Gokulashtami, Vinayakar Chaturti |
| Puratāsi | Shani (Saturdays) dedicated to Vishnu; Navarathri |
| Aippasi | Deepavali |
| Kārtikai | Thingal (Mondays) dedicated to Shiva; Karthigai Deepam, Karthigai Pournami |
| Margaḻi | Hanuman Jayanti, Thiruvathirai, Vaikuntha Ekadasi [36] |
| Thai | Pongal, Thaipusam |
| Māsi | Maha Shivaratri, Masi Maham, Poochoriyal |
| Panguni | Panguni Uthiram, Rama Navami |
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