Indian national calendar and other Indian calenders

Every major state in India has its own calendar And new year.

The Indian national calendar (sometimes called Saka calendar) is the official civil calendar in use in India. It is used, alongside the Gregorian calendar, by The Gazette of India, news broadcasts by All India Radio, and calendars and communications issued by the Government of India.
The term may also ambiguously refer to the Hindu calendar, and the Saka era is commonly used by different calendars as well.

The Shalivahana era, also known as the Saka era, is used with Hindu calendars, the Indian national calendar, and the Cambodian Buddhist calendar. Its year zero begins near the vernal equinox of the year 78.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. Its structure is like the Persian calendar.

In leap years, Chaitra has 31 days and starts on March 21 instead. 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, Hindu lunisolar calendars, so variations in spelling exist


Western Kshatrapas (35–405 BC) were Saka rulers of the western part of India (Saurashtra and Malwa: modern Gujarat, Southern Sindh, Maharashtra, Rajasthan). They were successors to the Indo-Scythians who invaded the area of Ujjain and established the Saka era (with Saka calendar), marking the beginning of the long-lived Saka Western Satraps kingdom.


The era was also used by Javanese courts from Old Javanese times until 1633, when it was replaced by Anno Javanico, a hybrid Javanese-Islamic system.

It is also this particular era which aided historians in dating the Laguna Copperplate Inscription, the earliest written document found in the Philippines.


The calendar was introduced by the Calendar Reform Committee in 1957, as part of the Indian Ephemeris and Nautical Almanac, which also contained other astronomical data, as well as timings and formulae for preparing Hindu religious calendars, in an attempt to harmonise this practice. Despite this effort, local variations based on older sources such as the Surya Siddhanta may still exist.


Vikram Samvat (Bikram Sambat, Vikram Samvat Vikram Samwat or Vikram's Era, is the calendar established by Indian emperor Vikramaditya. It is a popularly used calendar in India and the official calendar of Nepal.
The Vikrama Samvat was founded by the emperor Vikramaditya of Ujjain following his victory over the Sakas in 56 BCE, although it is popularly (and incorrectly) associated with the subsequent king Chandragupta Vikramaditya. It is a lunar calendar based on ancient Hindu tradition (see Hindu calendar and Vedic time keeping). The Vikram Samvat calendar is 56.7 years ahead (in count) of the solar Gregorian calendar. For example, the year 2056 BS began in CE 1999 and ended in CE 2000. In Northern India the calendar starts with the first day after the new moon in the month Chaitra, which usually falls in March/April in the Gregorian calendar. Again in Western India the same era begins with the first day after the new moon in the month of Kartika which usually falls in October and November in the Gregorian calendar. In Nepal, it begins in mid-April and marks the start of the solar new year.
In India, Saka Calendar is officially used but interestingly in the Hindi version of Preamble of The Constitution of India, the date of adoption of constitution 26 Nov 1949 is presented in Vikram Samvat (Margsheersh Shukla Saptami Samvat 2006 ). A confusion and ignorance there as well . . .

In Nepal, this is the calender in use.

This calendar derives its name from the original king Vikramaditya of Ujjain. After the rise of the Rana oligarchs in Nepal, Vikram Sambat came into unofficial use along with the official Shaka Sambat for quite some time. They discontinued Shaka Sambat in its 1823rd year and replaced it with Vikram Samwat for official use since then to date. Vikram Sambat came into official use in its 1958th year. The calendar is widely in use in western India, where it is known as the Vikram Samvat.
The date is supposed to mark the victory of king Vikramaditya over the Sakas, who had invaded Ujjain. To the new era was established to commemorate this event. Alternatively, it has been thought by some scholars to correspond to the Azes era, of the Indo-Scythian king Azes I, but this seems to be now thoroughly discredited by Falk and Bennett who place the inception of the Azes era in 47/6 BC.


In addition to these two major calenders, we have Tamil, Bengali and Malayali calenders. Karnataka, Andhra Pradesh, Assam and Orissa also have their own New years.