Bihar Day (Bihar Diwas) is observed every year on March 22,]marking the formation of the state of Bihar, in India. On 22 March 1912, the Bihar and Orissa divisions of the Bengal Province were separated to form the Province of Bihar and Orissa in British India. The day is a public holiday in Bihar.
Bihar Day was started and celebrated on large scale by Bihar Government
in the tenure of Nitish Kumar. Apart from India, it is celebrated in
countries including the United States, Germany, Britain (Scotland),
Australia, Canada, Bahrain, Qatar, United Arab Emirates, Trinidad and Tobago
and Mauritius.