The United Provinces of British India, more commonly known as the United Provinces, was a province of British India, which came into existence on 3 January 1921 as a result of the renaming of the United Provinces of Agra and Oudh. It corresponded approximately to the combined regions of the present-day Indian states of Uttar Pradesh and Uttarakhand. It ceased to exist on 1 April 1937 when it was renamed as the United Provinces. Lucknow became its capital some time after 1921.