| 22531 | February 28 | Event | 1928 – C. V. Raman discovers Raman scattering. |
| 22532 | February 28 | Event | 1933 – Gleichschaltung: The Reichstag Fire Decree is passed in Germany a day after the Reichstag fire. |
| 22533 | February 28 | Event | 1935 – DuPont scientist Wallace Carothers invents nylon. |
| 22534 | February 28 | Event | 1939 – The erroneous word "dord" is discovered in the Webster's New International Dictionary, Second Edition, prompting an investigation. |
| 22535 | February 28 | Event | 1940 – Basketball is televised for the first time (Fordham University vs. the University of Pittsburgh in Madison Square Garden). |
| 22536 | February 28 | Event | 1942 – The heavy cruiser USS Houston is sunk in the Battle of Sunda Strait with 693 crew members killed, along with HMAS Perth which lost 375 men. |
| 22537 | February 28 | Event | 1947 – February 28 Incident: In Taiwan, civil disorder is put down with the loss of an estimated 30,000 civilians. |
| 22538 | February 28 | Event | 1948 – Christiansborg Cross-Roads shooting in the Gold Coast, when a British police officer opens fire on a march of ex-servicemen, killing three of them and sparking major riots in Accra. |
| 22539 | February 28 | Event | 1953 – James Watson and Francis Crick announce to friends that they have determined the chemical structure of DNA the formal announcement takes place on April 25 following publication in April's Nature (pub. April 2). |
| 22540 | February 28 | Event | 1954 – The first color television sets using the NTSC standard are offered for sale to the general public. |
| 22541 | February 28 | Event | 1958 – A school bus in Floyd County, Kentucky hits a wrecker truck and plunges down an embankment into the rain-swollen Levisa Fork river. The driver and 26 children die in what remains one of the worst school bus accidents in U.S. history. |
| 22542 | February 28 | Event | 1959 – Discoverer 1, an American spy satellite that is the first object intended to achieve a polar orbit, is launched. It failed to achieve orbit. |
| 22543 | February 28 | Event | 1972 – Sino-American relations: The United States and People's Republic of China sign the Shanghai Communiqué. |
| 22544 | February 28 | Event | 1975 – In London an underground train fails to stop at Moorgate terminus station and crashes into the end of the tunnel, killing 43 people. |
| 22545 | February 28 | Event | 1980 – Andalusia approves its statute of autonomy through a referendum. |
| 22546 | February 28 | Event | 1983 – The final episode of M*A*S*H airs, with almost 106 million viewers. It still holds the record for the highest viewership of a season finale. |
| 22547 | February 28 | Event | 1985 – The Provisional Irish Republican Army carries out a mortar attack on the Royal Ulster Constabulary police station at Newry, killing nine officers in the highest loss of life for the RUC on a single day. |
| 22548 | February 28 | Event | 1986 – Olof Palme, prime minister of Sweden, is assassinated in Stockholm. |
| 22549 | February 28 | Event | 1991 – The first Gulf War ends. |
| 22550 | February 28 | Event | 1993 – Bureau of Alcohol, Tobacco and Firearms agents raid the Branch Davidian church in Waco, Texas with a warrant to arrest the group's leader David Koresh. Four BATF agents and five Davidians die in the initial raid, starting a 51-day standoff. |
| 22551 | February 28 | Event | 1995 – Former Australian Liberal party leader John Hewson resigns from the Australian parliament almost two years after losing the Australian federal election, 1993. |
| 22552 | February 28 | Event | 1997 – An earthquake in northern Iran is responsible for about 3,000 deaths. |
| 22553 | February 28 | Event | 1997 – The North Hollywood shootout takes place, resulting in the injury of 19 people and the deaths of both perpetrators. |
| 22554 | February 28 | Event | 1997 – GRB 970228, a highly luminous flash of gamma rays, strikes the Earth for 80 seconds, providing early evidence that gamma-ray bursts occur well beyond the Milky Way. |
| 22555 | February 28 | Event | 1998 – First flight of RQ-4 Global Hawk, the first unmanned aerial vehicle certified to file its own flight plans and fly regularly in U.S. civilian airspace. |
| 22556 | February 28 | Event | 1998 – Kosovo War: Serbian police begin the offensive against the Kosovo Liberation Army in Kosovo. |
| 22557 | February 28 | Event | 2001 – The Nisqually earthquake measuring 6.8 on the Richter scale hits the Nisqually Valley and the Seattle, Tacoma, and Olympia area of the U.S. state of Washington. |
| 22558 | February 28 | Event | 2001 – Six passengers and four railway staff are killed and a further 82 people suffer serious injuries in the Selby rail crash. |
| 22559 | February 28 | Event | 2002 – During the religious violence in Gujarat, the 97 people killed in the Naroda Patiya massacre and 69 in Gulbarg Society massacre. |
| 22560 | February 28 | Event | 2004 – Over one million Taiwanese participating in the 228 Hand-in-Hand Rally form a 500-kilometre (310 mi) long human chain to commemorate the February 28 Incident in 1947 |