The Panglong Agreement (Burmese: ပင်လုံစာချုပ် [pɪ̀ɴ lòʊɴ sà dʑoʊʔ]) was reached between the Burmese government under Aung San and the Shan, Kachin, and Chin peoples on 12 February 1947. U Aung Zan Wai, U Pe Khin, Major Aung, Sir Maung Gyi and Dr. Sein Mya Maung and Myoma U Than Kywe were among the negotiators of the historical Panglong Conference negotiated with Bamar leader General Aung San and other ethnic leaders in 1947. The agreement accepted "Full autonomy in internal administration for the Frontier Areas" in principle and envisioned the creation of a Kachin State by the Constituent Assembly. It continued the financial relations established between the Shan states and the Burmese federal government, and envisioned similar arrangements for the Kachin Hills and the Chin Hills.

The day is celebrated in Myanmar as Union Day each February 12.^[1]