When was the Indian national calendar adopted?

Q. When was the Indian national calendar adopted?

(a) 26 January 1940

(b) 15 August 1947

(c) 26 January 1926

(d) 22 March 1957

Ans: (d) 22 March 1957

Explanation: The Indian national calendar, also known as the Saka calendar, was adopted by the Government of India on 22 March 1957. This calendar is based on the Saka Era, which starts from the year 78 CE. The decision to adopt the Saka calendar was made to reflect the cultural and historical significance of the Indian calendar system. It is widely used in official government communications and for determining religious and cultural events in India.