 The signing of Panglong Agreement is now celebrated as a national holiday, Union Day, in Myanmar.He was born in Thongwa, Burma on 26 December 1924 to Daw Sein Kyawt and U Sein.Educated at Rangoon University, Than Kywe was a representative at the Panglong conference with General Aung San that initiated the formation of the new nation of Union of Burma in February 1947.