Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. 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.