The Indian national calendar, sometimes called the Saka calendar, is used, alongside the Gregorian calendar, by The Gazette of India, in news broadcasts by All India Radio and in calendars and communications issued by the Government of India.
Originally through historical Indian influence, the Saka calendar is also used in Java and Bali among Indonesian Hindus. Nyepi, the "Day of Silence", is a celebration of the Saka new year in Bali. Nepal's Nepal Sambat evolved from the Saka calendar. The Saka calendar was also used in several areas in the modern-day Philippines as written in the Laguna Copperplate Inscription. In India, Yugabda is also used with corresponding months of Saka/Nepal Sambat. Yugabda is based on Kaliyuga Sankhya preserved by Indian Astrology. Kali Yuga began 5,124 years ago and has 426,876 years left as of 2023 CE. Kali Yuga will end in the year 428,899 CE.
|#||Name (Sanskrit)||Length||Start date (Gregorian)||Tropical zodiac||Tropical zodiac (Sanskrit)|
Chaitra is the first month of the calendar. Chaitra has 30 days and starts on March 22, except in leap years, when it has 31 days and starts on March 21. The months in the first half of the year all have 31 days, to take into account the slower movement of the sun across the ecliptic at this time.
The names of the months are derived from older, Buddhist lunisolar calendar, so variations in spelling exist, and there is a possible source of confusion as to what calendar a date belongs to.
Years are counted in the Saka era, which starts its year 0 in the year 78 of the Common Era. To determine leap years, add 78 to the Saka year – if the result is a leap year in the Gregorian calendar, then the Saka year is a leap year as well.
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Senior Indian Astrophysicist Meghnad Saha was the head of the Calendar Reform Committee under the aegis of the Council of Scientific and Industrial Research. Other members of the Committee were: A. C. Banerjee, K. L. Daftari, J. S. Karandikar, Gorakh Prasad, R. V. Vaidya and N. C. Lahiri. It was Saha's effort, which led to the formation of the Committee. The task before the Committee was to prepare an accurate calendar based on scientific study, which could be adopted uniformly throughout India. The Committee had to undertake a detailed study of thirty different calendars prevalent in different parts of the country. The task was further complicated by the integration of those calendars with religion and local sentiments. India's first prime minister, Jawaharlal Nehru, in his preface to the Report of the Committee, published in 1955, wrote: "They (different calendars) represent past political divisions in the country ... . Now that we have attained Independence, it is obviously desirable that there should be a certain uniformity in the calendar for our civic, social, and other purposes, and this should be done on a scientific approach to this problem." Usage started officially at 1 Chaitra 1879, Saka Era, or 22 March 1957.
- Astronomical basis of the Hindu calendar
- Bengali calendar, a related Indic calendar
- Hindu calendar
- History of calendars
- Indian New Year's days
- Kollam era the Malayalam calendar
- List of calendars
- Persian calendar
- Ritu (Indian season)
- Saka era
- Tamil calendar
- Vikram Samvat
- Bisuddhasiddhanta Panjika
- "Gg Holiday Calendar". Govt. of India Official website.
- Godwin, Joscelyn (2011). Atlantis and the Cycles of Time: Prophecies, Traditions, and Occult Revelations. Inner Traditions. pp. 300–301. ISBN 9781594778575.
- Merriam-Webster (1999). "Merriam-Webster's Encyclopedia of World Religions". In Doniger, Wendy; Hawley, John Stratton (eds.). Merriam-Webster. Merriam-Webster, Incorporated. pp. 445 (Hinduism), 1159 (Yuga). ISBN 0877790442.
* HINDUISM: Myths of time and eternity: ... Each yuga is preceded by an intermediate "dawn" and "dusk." The Krita yuga lasts 4,000 god-years, with a dawn and dusk of 400 god-years each, or a total of 4,800 god-years; Treta a total of 3,600 god-years; Dvapara 2,400 god-years; and Kali (the current yuga) 1,200 god-years. A mahayuga thus lasts 12,000 god-years ... Since each god-year lasts 360 human years, a mahayuga is 4,320,000 years long in human time. Two thousand mahayugas form one kalpa (eon) [and pralaya], which is itself but one day in the life of Brahma, whose full life lasts 100 years; the present is the midpoint of his life. Each kalpa is followed by an equally long period of abeyance (pralaya), in which the universe is asleep. Seemingly the universe will come to an end at the end of Brahma's life, but Brahmas too are innumerable, and a new universe is reborn with each new Brahma.
* YUGA: Each yuga is progressively shorter than the preceding one, corresponding to a decline in the moral and physical state of humanity. Four such yugas (called ... after throws of an Indian game of dice) make up a mahayuga ("great yuga") ... The first yuga (Krita) was an age of perfection, lasting 1,728,000 years. The fourth and most degenerate yuga (Kali) began in 3102 BCE and will last 432,000 years. At the close of the Kali yuga, the world will be destroyed by fire and flood, to be re-created as the cycle resumes. In a partially competing vision of time, Vishnu's 10th and final AVATAR, KALKI, is described as bringing the present cosmic cycle to a close by destroying the evil forces that rule the Kali yuga and ushering in an immediate return to the idyllic Krita yuga.
- Gupta, S. V. (2010). "Ch. 1.2.4 Time Measurements". In Hull, Robert; Osgood, Jr., Richard M.; Parisi, Jurgen; Warlimont, Hans (eds.). Units of Measurement: Past, Present and Future. International System of Units. Springer Series in Materials Science: 122. Springer. pp. 6–8. ISBN 9783642007378.
Paraphrased: Deva day equals solar year. Deva lifespan (36,000 solar years) equals 100 360-day years, each 12 months. Mahayuga equals 12,000 Deva (divine) years (4,320,000 solar years), and is divided into 10 charnas consisting of four Yugas: Satya Yuga (4 charnas of 1,728,000 solar years), Treta Yuga (3 charnas of 1,296,000 solar years), Dvapara Yuga (2 charnas of 864,000 solar years), and Kali Yuga (1 charna of 432,000 solar years). Manvantara equals 71 Mahayugas (306,720,000 solar years). Kalpa (day of Brahma) equals an Adi Sandhya, 14 Manvantaras, and 14 Sandhya Kalas, where 1st Manvantara preceded by Adi Sandhya and each Manvantara followed by Sandhya Kala, each Sandhya lasting same duration as Satya yuga (1,728,000 solar years), during which the entire earth is submerged in water. Day of Brahma equals 1,000 Mahayugas, the same length for a night of Brahma (Bhagavad-gita 8.17). Brahma lifespan (311.04 trillion solar years) equals 100 360-day years, each 12 months. Parardha is 50 Brahma years and we are in the 2nd half of his life. After 100 years of Brahma, the universe starts with a new Brahma. We are currently in the 28th Kali yuga of the first day of the 51st year of the second Parardha in the reign of the 7th (Vaivasvata) Manu. This is the 51st year of the present Brahma and so about 155 trillion years have elapsed. The current Kali Yuga (Iron Age) began at midnight on 17/18 February 3102 BC in the proleptic Julian calendar.
- "National Identity Elements - National Calendar - Know India: National Portal of India". knowindia.gov.in. Retrieved 2020-06-14.
- Bromberg, Irv. "The Lengths of the Seasons". University of Toronto, Canada. Retrieved 6 July 2013.
- Quint, The (22 March 2019). "Happy 'Saka' New Year 1941: Story Behind India's National Calendar". TheQuint. Retrieved 12 August 2020.
- "Meghnad Saha, A Pioneer in Astrophysics". Vigyan Prasar Science Portal. Archived from the original on 23 February 2015.
- Saha, M. N. (Chairman) (1955) Report of the Calendar Reform Committee New Delhi: Council of Scientific and Industrial Research
- Richards, Edward Graham (1998). Mapping Time: The Calendar and Its History (illustrated, reprint, revised ed.). Oxford University Press. pp. 184–185. ISBN 978-0-19-286205-1.
- Calendars and their History (by L.E. Doggett)
- Indian Calendars (by Leow Choon Lian, pdf, 1.22mb)
- Indian National Calendar
- India Meteorological Department/ Positional Astronomy Centre: current and past issues of the Rashtriya Panchang and The Indian Astronomical Ephemeris