January 1, 1939
1939–45 part of the Eastern Front during WWII
Military battle in 1939
1939 New York World's Fair — fair held at Flushing Meadows–Corona Park in Queens, New York
8th Chess Olympiad — FIDE chess tournament for national teams
Porajmos — mass murder against Roma people in Europe
1939 South American Championship — football tournament
1939 early battle of World War II
Italian invasion of Albania — 1939 World War II invasion
White Paper of 1939 — 1939 statement of British policy in Palestine
1939 first of four attempts by Japan to take the city of Changsha during the second Sino-Japanese War