Shashanka stands as a pivotal figure in the history of the Bengal region, recognized as the first independent king of a unified polity known as the Gauda Kingdom. His reign, which spanned from approximately five hundred ninety-three to six hundred thirty-six AD, marked a significant era in the seventh century. While some historians suggest his rule occurred between six hundred and six hundred thirty-six or seven CE, others propose a slightly earlier timeframe, placing it between five hundred ninety and six hundred twenty-five CE.
Notably, Shashanka is credited with the creation of the Bengali calendar, a remarkable achievement that underscores his influence on the cultural landscape of the region. The term Bangabda, referring to the Bengali year, has been discovered in two ancient Shiva temples, predating the era of Akbar, indicating that the Bengali calendar was in existence long before his time.
During his reign, Shashanka was a contemporary of notable figures such as Harsha and Bhaskaravarman of Kamarupa, which highlights the interconnectedness of regional powers during this period. His capital was established at Karnasuvarna, located in present-day Murshidabad, West Bengal, a site that served as a significant center of governance and culture.