Explanation: The National Calendar of India is based on the Saka era, which is a traditional Indian calendar system. It was officially adopted in 1957 to standardize the calendar for official purposes across the country. The Saka era begins in 78 CE, and the calendar follows a solar year, which means it is aligned with the seasons and is consistent with the solar cycle.
The adoption of the Saka Calendar as the National Calendar was a significant step towards unifying the calendar system used for official purposes in India. Prior to this, various regions in India used different calendar systems, including the Vikram Samvat Calendar and the Gregorian Calendar, which led to inconsistencies and confusion.
The Saka Calendar is a solar calendar, which means it is based on the position of the Sun and the Earth's revolution around it. This is in contrast to the lunar calendars, such as the Vikram Samvat Calendar and the Hindu Calendar, which are based on the phases of the Moon. The solar calendar is more suitable for official and administrative purposes because it aligns with the agricultural and seasonal cycles, which are important for planning and organizing activities in India.
The Gregorian Calendar, while widely used internationally for commercial and diplomatic purposes, is not the National Calendar of India. It is a solar calendar that was introduced by Pope Gregory XIII in 1582 and is now the most widely used civil calendar in the world. However, it does not align with the traditional Indian calendar systems and is not suitable for official purposes in India.
The Vikram Samvat Calendar, which starts in 57 BCE, is another traditional Indian calendar system. It is widely used in some parts of India, particularly in the states of Gujarat, Maharashtra, and Madhya Pradesh, for religious and cultural purposes. However, it is not the National Calendar of India because it is a lunar calendar and does not align with the solar year.
The Hindu Calendar, also known as the Panchang, is a complex lunar calendar system that is used for religious and cultural purposes in India. It is based on the phases of the Moon and is not standardized for official purposes. The Hindu Calendar varies in different regions of India and does not align with the solar year, which is a key feature of the National Calendar.
In summary, the National Calendar of India is the Saka Calendar, which is a solar calendar based on the Saka era starting in 78 CE. It was adopted to standardize the calendar for official purposes and align with the solar year, making it suitable for administrative and official use across India.