Vikram Samvat
- The Vikram era started 57 years before the Christian era, i.e. around 57 BCE, and is in force in almost all of India except the region of Bengal.
- 57 BCE is the zero year.
- It is said to have been established by King Vikramaditya of Ujjain to commemorate his victory over the Saka rulers.
- It is a lunar calendar as it is based on the movement of the moon.
- It has 354 days in a year and every year is divided into 12 months namely Chaitra, Vaisakha, Jyeshtha, Ashadha, Sravana, Bhadrapada, Ashwina, Kartika, Margashirsha, Pausha, Magha and Phalguna.
Saka Samvat
- It was initiated by Kanishka.
- The zero year of Saka Samvat is 78 CE.
- It is both a solar and lunar calendar, with lunar months and solar year.
- It was adopted by the Government of India as the official calendar in the year 1957.
Hijri Calendar
- It is a lunar calendar.
- The zero year is 622 CE.
- It was initially started and followed in Saudi Arabia.
Gregorian Calendar
- This calendar is based on the birthday of the founder of Christianity, Jesus Christ.
- It is a solar year commencing from the first day of January and consists of 365 days.
