Bihar Day, also known as Bihar Diwas or Bihar Sthapana Diwas, is observed in the Indian state of Bihar every March 22. This day commemorates the formal separation of the province of Bihar and Orissa from the Bengal Presidency in 1912. The celebration was officially established in 2010 and the first event took place in 2011. On Bihar Day, government offices, schools, and most private companies in Bihar are closed, allowing for various cultural activities. The day is marked by concerts, sports competitions, exhibitions, and other events that celebrate the rich history and culture of Bihar. Notably, the region has historical significance, being home to ancient kingdoms and the birthplace of Buddhism. The holiday is also celebrated by Bihar natives living in other states of India and abroad.