- April 9
- Marshall Islands issues two postage stamps marking the 50th anniversary of the invasion of Denmark and Norway. [342.660]
- Norway issues two postage stamps marking the 50th anniversary of the German invasion of the country. [342.1277]
- April 12
- Australia issues five postage stamps depicting scenes from World War II. [306.512]
- April 16
- Marshall Islands issues a postage stamp marking the 50th anniversary of the Katyn Forest Massacre. [342.660]
- April 18
- The Gambia issues fourteen postage stamps depicting British RAF World War II fighter planes. [341.40]
- April 30
- Grenada issues eleven postage stamps depicting scenes of World War II. [341.424]
- Grenada Graendines issues eleven postage stamps depicting scenes of World War II. [341.458]
- May 3
- Bahamas issues two postage stamps marking the 50th anniversary of the Battle of Britain, depicting the Spitfire I, and Hurricane IIc. [306.614]
- The Falkland Islands issues five postage stamps marking the 50th anniversary of the Battle of Britain, depicting Spitfire planes. [340.972]
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- May 5
- Czechoslovakia issues a postage stamp marking the 45th anniversary of liberation from German control. [340.670]
- May 10
- Marshall Islands issues two postage stamps marking the 50th anniversary of the bombing of Rotterdam and the invasion of Belgium. [342.660]
- May 28
- Poland issues a postage stamp marking the 50th anniversary of the Battle of Narvik. [343.316]
- June 4
- Marshall Islands issues two postage stamps marking the 50th anniversary of the evacuation of the British at Dunkirk. [342.660]
- June 8
- Uganda issues eleven postage stamps depicting Allied World War II milestones. [282.678]
- June 16
- Marshall Islands issues a postage stamp marking the 50th anniversary of the occupation of Paris. [342.660]
- June 18
- St. Pierre & Miquelon issues a postage stamp marking the 50th anniversary of Charles de Gaulle's call for French resistance. [343.734]
- July 3
- Grenada issues two postage stamps marking the 25th anniversary of the US Airborne divisions. [341.425]
- Marshall Islands issues a postage stamp marking the 50th anniversary of the Battle of Mers-el Kebir. [342.660]
- July 18
- Marshall Islands issues a postage stamp marking the 50th anniversary of the Battles for Burma Road. [342.660]
- July 20
- Poland issues a postage stamp marking the 50th anniversary of the Katyn Forest Massacre. [343.316]
- August 9
- Maldives issues eleven postage stamps depicting World War II milestones. [342.586]
- September 4
- Jersey issues five stamps marking the 50th anniversary of the Battle of Britain. [341.340]
- September 5
- Isle of Man issues six stamps marking the 50th anniversary of the Battle of Britain. [341.353]
- September 9
- Marshall Islands issues four postage stamps marking the 50th anniversary of American destroyer ships traded for British bases. [342.660]
- September 15
- Belize issues six stamps marking the 50th anniversary of the Battle of Britain. [306.753]
- Marshall Islands issues four postage stamps marking the 50th anniversary of the end of the Battle of Britain. [342.660]
- St. Kitts issues two postage stamps marking the 50th anniversary of the Battle of Britain. [343.704]
- September 27
- Marshall Islands issues a postage stamp marking the 50th anniversary of the signing of the Tripartite Pact. [342.660]
- October
- The German Democratic Republic ceases to exist, as its territory is absorbed into the Federal Republic of Germany. [220.10]
- November 9
- Canada issues four postage stamps depicting Canada's contribution to World War II in 1940. [340.83]
- November 11
- Marshall Islands issues four postage stamps marking the 50th anniversary of the Battle of Taranto. [342.660]
- December 21
- Poland issues a postage stamp marking the 50th anniversary of Polish participation in the Battle of Britain. [343.317]
- December 28
- Malagasy issues a 100-franc postage stamp depicting Charles de Gaulle and the 1944 liberation of Paris. [728.629]
1991
-
- The Marshall Islands issues $5 and $50 coins to commemorate the Pearl Harbor attack. [253.12]
- February 5
- Marshall Islands issues a postage stamp marking the 50th anniversary of the Battle of Beda Fomm. [342.660]
- February 9
- Lithuanians vote by huge majority to restore pre-war independence. [682.4]
- March 1
- Antigua & Barbuda issues eleven postage stamps depicting World War II milestones. [306.377]
- (month unknown)
- The New Zealand territory of Tokelau issues two denominations of Pearl Harbor commemorative coins, 5 talu and 50 talu, struck by the Pobjoy Mint. Mintage of the larger coin in silver is limited to 50,000 pieces. [250.12]
- April 6
- Marshall Islands issues two postage stamps marking the 50th anniversary of the invasion of Greece and Yugoslavia. [342.660]
- April 8
- Guinea issues seven postage stamps depicting World War II battles. [341.509]
- May
- An unexploded Japanese torpedo in Pearl Harbor is dredged up. [148.82]
- May 27
- Marshall Islands issues four postage stamps marking the 50th anniversary of the sinking of the Bismarck. [342.660]
- Poland issues a postage stamp marking the 50th anniversary of the sinking of the Bismarck. [751.361]
- June 22
- Marshall Islands issues a postage stamp marking the 50th anniversary of the invasion of Russia. [342.660]
- July 15
- Uganda issues ten postage stamps depicting Charles de Gaulle during World War II. [282.679]
- July 29
- The Russian Federation and Lithuania sign a friendship treaty recognizing Lithuania as a sovereign state. [682.4]
- August 5
- The Federal and Islamic Republic of the Comoros issues eight postage stamps marking the 50th anniversary of the end of World War II. [340.427]
- August 14
- Marshall Islands issues two postage stamp marking the 50th anniversary of the declaration of the Atlantic Charter. [342.660]
- August 20
- Estonia declares indepence from the Soviet Union. [682.4]
- Latvia declares indepence from the Soviet Union. [682.4]
- September 2
- Dominica issues ten postage stamps marking the 50th anniversary of the Japanese attack on Pearl Harbor. [340.756]
- September 3
- The United States issues ten postage stamps marking World War II in 1941. [306.71]
- September 6
- The Soviet Union's new ruling council recognizes independence of Lithuania, Latvia, and Estonia. [682.1]
- September 19
- Bermuda issues four postage stamps depicting Bermuda during World War II. [306.781]
- October 2
- Marshall Islands issues a postage stamp marking the 50th anniversary of the siege of Moscow. [342.660]
- October 14
- Sierra Leone issues fifteen postage stamps depicting World War II motion pictures. [343.983]
- October 15
- Tuvalu issues four postage stamps depicting World War II ships. [282.660]
- October 31
- Marshall Islands issues two postage stamps marking the 50th anniversary of the sinking of the USS Reuben James. [342.660]
- November 8
- Canada issues four postage stamps depicting Canada's contribution to World War II in 1941. [340.83]
- November 18
- St. Vincent issues a postage stamp marking the 50th anniversary of the fall of Kiev, Ukraine. [343.778]
- St. Vincent issues fifteen postage stamps depicting American heroes of Pearl Harbor. [343.779]
- The Grenadines of St. Vincent issues ten postage stamps marking the 50th anniversary of the attack on Pearl Harbor, Hawaii. [343.809]
- The Grenadines of St. Vincent: Bequia issues three postage stamps marking the 50th anniversary of the attack on Pearl Harbor, Hawaii. [343.811]
- November 25
- St. Vincent issues three postage stamps depicting Charles de Gaulle giving his radio appeal, Dwight Eisenhower and the Normandy invasion, and the Morocco Conference. [343.779]
- December 6
- Palau issues ten postage stamps marking the 50th anniversary of World War II in the Pacific. [343.34]
- December 7
- Guyana issues ten postage stamps marking the 50th anniversary of the Japanese attack on Pearl Harbor. [341.551]
- Marshall Islands issues four postage stamps marking the 50th anniversary of the attack on Pearl Harbor. [342.660]
- December 9
- Antigua & Barbuda issues ten postage stamps marking the 50th anniversary of the Japanese attack on Pearl Harbor. [306.378]
- December 10
- Marshall Islands issues two postage stamps marking the 50th anniversary of the Japanese capture of Guam and Singapore. [342.660]
- Poland issues a postage stamp marking the 50th anniversary of the Polish armed forces at Tobruk. [751.362]
- December 20
- Marshall Islands issues two postage stamps marking the 50th anniversary of the first combat of the American Flying Tigers. [342.660]
- Sierra Leone issues fifteen postage stamps marking the 50th anniversary of the attack on Pearl Harbor, Hawaii. [343.984]
- December 23
- Marshall Islands issues a postage stamp marking the 50th anniversary of the fall of Wake Island. [342.660]
1992
- January 1
- Marshall Islands issues a postage stamp marking the 50th anniversary of the meeting of President Roosevelt and Prime Minister Winston Churchill at the Arcadia Conference. [342.660]
- January 2
- Marshall Islands issues a postage stamp marking the 50th anniversary of the Japanese entering Manila, Philippines. [342.660]
- January 6
- Uganda issues ten postage stamps marking the 50th anniversary of the Pearl Harbor attack, and the Battle of Midway. [282.680]
- January 23
- Marshall Islands issues a postage stamp marking the 50th anniversary of the Japanese taking Rabaul. [342.660]
- February 6
- Isle of Man issues four postage stamps marking the 50th anniversary of the Parachute Regiment in World War II. [341.354]
- February 15
- Marshall Islands issues a postage stamp marking the 50th anniversary of the Battle of the Java Sea. [342.660]
- February 19
- Australia issues five postage stamps depicting Australian battles in World War II. [306.514]
- March 5
- Russia issues a postage stamp marking the 47th anniversary of the end of World War II. [343.641]
- March 8
- Marshall Islands issues two postage stamps marking the 50th anniversary of the Japanese taking Rangoon, and landing on New Guinea. [342.660]
- March 11
- Marshall Islands issues a postage stamp marking the 50th anniversary of the General Douglas MacArthur leaving Corregidor, Philippines. [342.660]
- March 27
- Marshall Islands issues a postage stamp marking the 50th anniversary of the raid on St.-Nazaire, France. [342.660]
- April 9
- Marshall Islands issues a postage stamp marking the 50th anniversary of the surrender of Bataan, Philippines. [342.660]
- April 15
- Malta issues three postage stamps marking the 50th anniversary of the awarding of the George Cross to Malta for its war effort. [342.646]
- April 18
- Marshall Islands issues a postage stamp marking the 50th anniversary of the Doolittle raid on Tokyo, Japan. [342.660]
- May 6
- Marshall Islands issues a postage stamp marking the 50th anniversary of the fall of Corregidor, Philippines. [342.660]
- May 8
- Marshall Islands issues four postage stamps marking the 50th anniversary of the Battle of the Coral Sea. [342.660]
- May 12
- Tonga/Niuafo'ou issues postage stamps marking the 50th anniversary of World War II in the Pacific. [282.511]
- May 22
- Vanautu issues five postage stamps depicting planes of World War II operated by the New Hebrides. [282.789]
- May 26
- Tonga issues postage stamps marking the 50th anniversary of World War II in the Pacific. [282.498]
- June 4
- Marshall Islands issues four postage stamps marking the 50th anniversary of the Battle of Midway. [342.660]
- June 9
- Marshall Islands issues a postage stamp marking the 50th anniversary of the German destruction of the village of Lidice, Czechoslovakia. [342.660]
- June 12
- Philippines issues five postage stamps marking the 50th anniversary of World War II in the Philippines. [343.237]
- June 17
- Christmas Island issues four postage stamps marking the 50th anniversary of the sinking of the Eidsvold and Nissa Maru. [340.359]
- (month unknown)
- The Argentine government of President Carlos Saúl Menem releases hundreds of thousands of pages of documents naming over 1000 suspected Nazi war criminals who found refuge in Argentina since the World War II ended. [696.6]
- The Gambia issues ten postage stamps marking the 50th anniversary of World War II in the Pacific. [341.43]
- July 4
- Marshall Islands issues a postage stamp marking the 50th anniversary of the fall of Sevastopol. [342.660]
- July 5
- Marshall Islands issues two postage stamps marking the 50th anniversary of the German destruction of naval Convoy PQ-17 from Iceland to Russia. [342.660]
- August 7
- Marshall Islands issues a postage stamp marking the 50th anniversary of American Marines landing on Guadalcanal. [342.660]
- The Solomon Islands issues fifteen postage stamp marking the 50th anniversary of the Battle of Guadalcanal. [282.9]
- August 9
- Marshall Islands issues a postage stamp marking the 50th anniversary of the Battle of Savo Island. [342.660]
- August 17
- The United States issues ten postage stamps marking World War II in 1942. [306.74]
- August 19
- Marshall Islands issues two postage stamps marking the 50th anniversary of the Dieppe raid, and the Battle of Stalingrad. [342.660]
- August 24
- Marshall Islands issues a postage stamp marking the 50th anniversary of the Battle of Eastern Solomons. [342.660]
- (month unknown)
- The Solomon Islands issues a set of four coins struck by the British Royal Mint to commemorate the Battle of the Coral Seas. Coin denominations are $10, $25, $50, and $100. [251.14]
- September 10
- Palau issues ten postage stamps marking the 50th anniversary of World War II in the Pacific. [343.46]
- October 11
- Marshall Islands issues a postage stamp marking the 50th anniversary of the Battle of Cape Esperance. [342.660]
- October 13
- Cocos Islands issues three postage stamps marking the 50th anniversary of World War II. [340.365]
- October 15
- Special envoy from Russia gives Poland's president copies of documents authorizing the 1940 execution of 26,000 Polish servicemen, which had been denied by the Soviet Union for 50 years. [808.48]
- October 23
- Marshall Islands issues a postage stamp marking the 50th anniversary of the Battle of El Alamein. [342.660]
- November 10
- Canada issues four postage stamps depicting Canada's contribution to World War II in 1942. [340.83]
- December 31
- Marshall Islands issues two postage stamps marking the 50th anniversary of the Battle of Barents Sea. [342.660]
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