![]() March 10 – The NASDAQ Composite Index reaches an all-time high of 5,048.The next such leap year will occur in 2400. 2000 is the first such year to have a February 29 since the year 1600, making it only the second such occasion since the Gregorian Calendar was introduced in the late 16th century. Usually, century years are common years due to not being exactly divisible by 400. February 29 – A rare century leap year date occurs.February 21 – UNESCO holds the inaugural celebration of International Mother Language Day.February 9 – Torrential rains in Africa lead to the worst flooding in Mozambique in 50 years, which lasts until March and kills 800 people.February 6 – Second Chechen War: Battle of Grozny (1999–2000) ends as Russian forces conclude capture of the Chechen capital Grozny.February 5 – Second Chechen War: Novye Aldi massacre – Russian forces summarily execute 56-60 civilians in a suburb of Grozny.January 31 – Alaska Airlines Flight 261 crashes off the California coast into the Pacific Ocean all 88 passengers and crew are killed.January 30 – Kenya Airways Flight 431 crashes off the Ivory Coast into the Atlantic Ocean, killing 169 people.The United Nations' International Criminal Tribunal for the former Yugoslavia sentences five Bosnian Croats to up to 25 years in prison for the 1993 killing of more than 100 Bosnian Muslims.The Dow Jones Industrial Average closes at 11,722.98 (at the peak of the Dot-com bubble).January 10 – America Online announces an agreement to purchase Time Warner for $162 billion (the largest-ever corporate merger).January 6 – The last naturally-conceived Pyrenean ibex is found dead, apparently killed by a falling tree.As a result of massive effort, relatively few problems occurred. ![]() However, by the end of 1999, many companies had already converted to new, or upgraded, existing software. ![]() The year 2000 was the subject of Y2K concerns, which were fears that computers would not shift from 1999 to 2000 correctly. The year 2000 is sometimes abbreviated as "Y2K" (the "Y" stands for "year", and the "K" stands for " kilo" which means "thousand"). (For further information, see century and millennium.) Since the Gregorian calendar does not have year zero, its first millennium spanned from years 1 to 1000 inclusively and its second millennium from years 1001 to 2000. According to the Gregorian calendar, these distinctions fall to the year 2001, because the 1st century was retroactively said to start with the year AD 1. Popular culture holds the year 2000 as the first year of the 21st century and the 3rd millennium, because of a tendency to group the years according to decimal values, as if non-existent year zero were counted. Hence, a leap day is added every four years to make up for the difference and to keep the seasons and the calendar in sync.Establishments and disestablishments categoriesĢ000 in various calendars Gregorian calendarĢ000 was designated as the International Year for the Culture of Peace and the World Mathematical Year. Although this slight variation may not seem too significant, the extra quarter days in the solar year would make our calendar fall short of one day behind the solar year after every four years. This is to say that the calendar year and the solar year are not completely "in sync" if there are 365 days in every calendar year. This is approximately 365 ¼ days or 365.2422 days. To be precise, the Earth actually takes 365 days, 5 hours, 48 minutes, and 46 seconds to complete one revolution around the sun. However, the issue is that the solar year does not exactly correspond to 365 days. In the Gregorian calendar, there are 365 days in a year and that is meant to correspond to the period the Earth takes to complete one revolution around the sun (also known as the “solar year”). To address this question, we first need to know what determines the length of a calendar year in the first place. Now that we know the answer to the question “What is a leap year?”, the next question that inevitably arises is “Why do we have leap years?” A leap year is added to the calendar every four years. In a leap year, February has 29 days, instead of the usual 28. This is accounted for in the month of February. Instead of having the usual 365 days, a leap year has 366 days. This additional day ensures the synchrony between the calendar year and the seasonal/solar/astronomical year. A leap year is a calendar year with an additional day added.
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