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30th century BC: 29th century BC: 28th century BC: 27th century BC: 26th century BC: 25th century BC: 24th century BC: 23rd century BC: 22nd century BC: 21st century BC: 2nd millennium BC · 2000–1001 BC 20th century BC: 19th century BC: 18th century BC: 1790s BC: 1780s BC: 1770s BC: 1760s BC: 1750s BC: 1740s BC: 1730s BC: 1720s BC ...
List of years. This page indexes the individual years pages. Each year is ordered. 1st millennium BC. 8th Century BC. 719. 718. 717. 716. 715. 713. 7th century BC. 700. 699. 698. 697. 696. 695. 694. 693. 692. 691. 690. 689. 688. 687. 686. 685. 684. 683. 682. 681.
The 21st century is the current century in the Anno Domini or Common Era, in accordance with the Gregorian calendar. It began on 1 January 2001 and will end on 31 December 2100. It is the first century of the 3rd millennium .
List of years. This page indexes the individual years pages. 3rd millennium. 21st century. 2100. 2099. 2098. 2097. 2096. 2095. 2094. 2093. 2092. 2091. 2090. 2089. 2088. 2087. 2086. 2085. 2084. 2083. 2082. 2081. 2080. 2079. 2078. 2077. 2076. 2075. 2074. 2073. 2072.
- The 21st Century Started in 2001
- Year Zero
- Anno Domini
- Year 1 BCE Was Followed by Year CE 1
- Round Number Bias
- What Did We Even Celebrate?
- Only in Gregorian and Julian Calendars
In 1999, the world was preparing for the New Year's party of a lifetime. The year number in the Gregorian calendar was about to tick over to 2000, supposedly ushering in not only the 21st century but also the 3rd millennium CE. However, the party was held one year too early—it should have been on January 1, 2001. CE, BCE, AD, BC,: What's the differ...
It all boils down to the question: was there a year 0? Let's first assume that year BCE 0 existed. This would mean that: 1. 1 full year would have passed at the end of year 0 since the beginning of the year count; 2. 2 years would have passed at the end of year 1; 3. and so on... This means that 2000 years, two full millennia, would have passed at ...
Anno domini, the year numbering system (calendar era) we use today, was devised by a 6th-century monk named Dionysius Exiguus, who lived in an area now part of Romania and Bulgaria. Dionysius used Roman numerals to number the years “since the incarnation of our Lord Jesus Christ”, as he put it in his writings—and there is no Roman numeral for the n...
This means that year AD 1 directly followed year 1 BC, without the year count ever reaching zero. In other words, the first year of the anno dominiera was year 1, not year 0. As a consequence, 1. 1 full year had passed at the end of year 1; 2. 2 years had passed at the end of year 2; 3. and so on... So, at the end of year 1999, as people were celeb...
Of course, the big fuss over the year 2000, or Y2K, was understandable from a psychological point of view. The human brain is predisposed to highlight “big numbers”—a tendency psychologists call the round number bias. It causes us to throw extra-glamorous parties on our 20th, 30th, or 40th birthdays and to celebrate milestones like the 1000th like ...
Even people celebrating the beginning of the new millennium on the correct date must contend with the fact that, in astronomical terms, there was nothing special about this particular event. A year on Earth is defined as the time it takes Earth to complete an orbit around the Sun. This is called a solar or tropical year. Solar calendar systems, suc...
In fact, looking at other calendar systems, it becomes clear how ambiguous year numbers are. For example, year 2001 marked the beginning of the 3rd millennium in the Gregorian calendar only. Other calendars, such as the Jewish calendar, the Islamic calendar, and the Hindu calendar, use completely different year numbers. So, while the Gregorian cale...
16th century AD AD 1601-1700 17th century AD AD 1701-1800 18th century AD AD 1801-1900 19th century AD AD 1901-2000 20th century AD AD 2001-present day 21st century AD 3rd millennium AD
With few exceptions, we usually think about centuries and millennia as numbered entities, counted up from year AD 1, such as “the 21st century” or “the third millennium.” Decades, however, are commonly categorized based on the year numbers.
