The Hindu calendar, also known as the Panchang, is a traditional calendar system used by Hindus worldwide. However, there are several synonyms and alternative names for this calendar. One of the most common synonyms is the Vedic calendar, which refers to the Vedas, the ancient scriptures of Hinduism. Another synonym is the Saka calendar, which is named after King Shalivahana, who introduced this calendar in 78 CE. Additionally, the Hindu lunar calendar, the Hindu solar calendar, and the Indian calendar are used interchangeably with the Hindu calendar. Other names for the Hindu calendar include Hindu Panjika, Hindu Panchanga, and Hindu almanac. All these names refer to the same traditional calendar system that is used to determine important festivals and auspicious dates in Hinduism.