Popular culture holds the year 2000 as the first year of the 21st century and the 3rd millennium, due to a tendency to group the years according to decimal values, as if the nonexistent year zero were counted. According to the Gregorian calendar, these distinctions fall to the year 2001, because the 1st century back then was also retroactively said to start with year AD 1. Since the Gregorian calendar doesn't have year zero, its first millennium spanned from years 1 to 1000 inclusively and its second millennium from years 1001 to 2000. If you want to know something you have never met before, see century and millennium. The year 2000 is sometimes abbreviated as Y2K, so the Y stands for year, and the K stands for kilo which means "thousand." The year 2000 was the subject of Y2K concerns, which were fears that computers wouldn't shift from 1999 to 2000 correctly. However, by the end of 1999, many companies had already converted to new, or upgraded, existing software. Some even obtained Y2K certification. As a result of massive effort, relatively few problems occurred.
January 1 - To most people, it was the first day of the 21st century and 3rd millennium. However, there are some people who argue that both distinctions happened a year later, on January 1, 2001.
February 4 – German extortionistKlaus-Peter Sabotta is jailed for life for attempted murder and extortion, in connection with the sabotage of German railway lines.
March 20 – Jamil Abdullah Al-Amin (H. Rap Brown), a former Black Panther, is captured after a gun battle in Atlanta, Georgia that leaves a sheriff's deputy dead.
March 21 – The U.S. Supreme Court rules that the government lacks authority to regulate tobacco as an addictivedrug, throwing out the Bill Clinton administration's main anti-smoking initiative.
April 3 – United States v. Microsoft: Microsoft is ruled to have violated United Statesantitrust laws by keeping "an oppressive thumb" on its competitors.
April 22 – Brazil officially celebrates its 500th anniversary, with protests, especially from native and black populations.
April 22 – In a predawn raid, federal agents seize 6-year old Elián González from his relatives' home in Miami, Florida and fly him to his Cuban father in Washington, DC, ending one of the most publicized custody battles in U.S. history.
July 2 – France beats Italy 2–1 to win Euro 2000 with a golden goal.
July 2 – Vicente Fox is elected President of Mexico, as candidate of the rightist PAN (National Action Party), ending 71 years of PRI (Institutional Revolutionary Party) rule.
July 10 – In southern Nigeria, a leaking petroleum pipeline explodes, killing about 250 villagers who were scavenging gasoline.
July 18 – Sussex police launch a murder investigation after the body of a girl found near Pulborough is confirmed to be that of Sarah Payne, who was reported missing on July 1.
July 21–23 – 26th G8 summit; issues include AIDS, the 'digital divide', and halving world poverty by 2015.
July 22 – News of the World urges its readers to sign a petition for Sarah's Law, new legislation in response to the murder of Sarah Payne, which would give parents the right to know whether a convicted paedophile was living in their area.
August 3 – Rioting erupts on the Paulsgrove estate in Portsmouth, Hampshire, England, after more than 100 people besiege the home of a block of flats allegedly housing a convicted paedophile. This is the latest vigilante violence against suspected sex offenders since the beginning of the "naming and shaming" anti-paedophile campaign by the tabloidnewspaperNews of the World.
August 8 – The Confederate submarine H.L. Hunley is raised to the surface after 136 years on the ocean floor.
August 12 – The Russian submarine K-141 Kursk sinks in the Barents Sea, resulting in the deaths of all 118 men on board.
September 6 – In Paragould, Arkansas, Breanna Lynn Bartlett-Stewart is stillborn to Scott Stewart and Lisa Bartlett. Breanna Lynn's stillbirth is notable for being the first stillbirth to be resolved by means of the Kleihauer-Betke test.
September 6 – The last wholly Swedish-ownedarms manufacturer, Bofors, is sold to American arms manufacturer United Defense.
September 6–8 – World leaders attend the Millennium Summit at UN Headquarters.
September 7–14 – The UK fuel protests take place, with refineries blockaded, and supply to the country's network of petrol stations halted.
September 26 – The Greek ferry Express Samina sinks off the coast of the island of Paros; 80 out of more than 500 passengers die in one of Greece's worst sea disasters.
September 26 – Anti-globalization protests in Prague (some 15,000 protesters) turn violent during the IMF and World Bank summits.
September 28 – Israeli opposition leader Ariel Sharon visits the Temple Mount, protected by a several-hundred-strong Israeli police force. Palestinian riots erupt, leading to a full-fledged armed uprising (called the Al-Aqsa Intifada by sympathizers and the Oslo War by opponents).
September 29 – The Long Keshprison in Northern Ireland is closed.
October 21 – Fifteen Arab leaders convene in Cairo, Egypt, for their first summit in 4 years; the Libyan delegation walks out, angry over signs the summit will stop short of calling for breaking ties with Israel.
October 22 – The Mainichi Shinbun newspaper exposes Japanese archeologist Shinichi Fujimura as a fraud; Japanese archaeologists had based their treatises on his findings.
October 26 – Pakistani authorities announce that their police have found an apparently ancient mummy of a Persian princess in the province of Balochistan. Iran, Pakistan and the Taliban all claim the mummy until Pakistan announces it is a forgery on April 17, 2001.
October 30 – This is the final date during which there is no human presence in space; on October 31, Soyuz TM-31 launches, carrying the first resident crew to the International Space Station. The ISS has been continuously crewed since.
November 7 – In London, a criminal gang raids the Millennium Dome to steal The Millennium Star diamond, but police surveillance catches them in the act.
November 17 – A catastrophic landslide in Log pod Mangartom, Slovenia, kills 7, and causes millions of SIT of damage. It is one of the worst catastrophes in Slovenia in the past 100 years.
November 28 – Ukrainian politician Oleksander Moroz touches off the Cassette Scandal by publicly accusing PresidentLeonid Kuchma of involvement in the murder of journalist Georgiy Gongadze.
December 30 – Rizal Day bombings: A series of bombs explode in various places in Metro Manila, Philippines, within a span of a few hours, killing 22 and injuring about 100.
December 31 – Strictly speaking, it was the last day of the 2nd millennium and 20th century in the Gregorian calendar, but according to Popular Culture, the last day of these two distinctions was December 31, 1999.
Moore, Roger (January 20, 2000). "Hedy Lamar: 1913–2000". Orlando Sentinel (obituary). Archived from the original on November 15, 2017. Retrieved April 27, 2018.