A century (From the Latin cent, one hundred) is one hundred consecutive years. Latin ( lingua Latīna, laˈtiːna is an Italic language, historically spoken in Latium and Ancient Rome. A year (from Old English gēr) is the time between two recurrences of an event related to the Orbit of the Earth around the Sun Centuries are numbered ordinally (e. g. "The Seventh Century AD"). The 7th century is the period from 601 to 700 in accordance with the Julian calendar in the Christian / Common Era.

Start and End in the Gregorian Calendar

According to the Gregorian calendar, the 1st century AD started on January 1, 1 and ended on December 31, 100. The Gregorian calendar is the most widely used Calendar in the world today The 1st century was the Century that lasted from 1 to 100 according the Julian calendar. New Year See also New Year The Ancient Romans began their consular year on January 1st since 153 BC Year 1 ( I) was a Common year starting on Saturday of the Julian calendar. Events 406 – Vandals, Alans and Suebians cross the Rhine, beginning an invasion of Gallia. The 2nd century started at year 101, the third at 201, etc. The 2nd century is the period from 101 to 200 in accordance with the Julian calendar in the Christian / Common Era. The 3rd century is the period from 201 to 300 in accordance with the Julian calendar in the Christian / Common Era. Events By Place Asia Earliest trace of the Kyrgyz. By Topic Religion In November The n-th century will start on the year 100×n - 99. A century will only include one year, the centennial year, that starts with the century's number (e. g. 1900 is in the 19th century). Year 1900 ( MCM) was an exceptional Common year starting on Monday (link will display the full calendar of the Gregorian calendar The 19th century of the Common Era began on January 1, 1801 and ended on December 31, 1900, according to the Gregorian calendar

End of the 20th century

It is commonly-held misconception that the 20th century ended on December 31, 1999. The twentieth century of the Common Era began on Year 1999 ( MCMXCIX) was a Common year starting on Friday (link will display full 1999 Gregorian calendar) The 20th century actually ended on December 31, 2000, its centennial year. 2000 ( MM) was a Leap year that started on Saturday of the Common Era, in accordance with the Gregorian calendar.

1st Century AD and BC

There is no "zeroth century" in between the 1st century BC and the 1st century AD. The 1st century BC started the first day of 100 BC and ended the last day of 1 BC. The first century BC includes the years 100 BC to 1 BC. Year 1 BC was a Leap year starting on Thursday of the Julian calendar. Other centuries BC follow the same pattern.

Dating Systems before the Century

The oldest dating systems were based on the reigns of monarchs, (e. A regnal year is a year of the reign of a sovereign. From Latin regnum meaning kingdom rule g. the fifteenth year of King George). Similarly, other systems arose dating from the founding of a dynasty, city or religion. For example, Ab urbe condita counts the Year 1 as the founding of Rome, Anno Domini as the first full year of Jesus Christ's life and the Islamic calendar counts in the year of the Hijra. Ab Urbe condita (literally "from Rome ( Roma ˈroma Roma is the capital city of Italy and Lazio, and is Italy's largest and most populous city with more than 2 The Islamic calendar or Muslim calendar ( Arabic: التقويم الهجري at-taqwīm al-hijrī; Persian: تقویم هجری قمری ‎ The Hijra (هِجْرَة or withdrawal is the migration of Muhammad and his followers to the city of Medina in 622 ( Common Era) The Gregorian calendar adopted Anno Domini as the basis for its numbering system. The Gregorian calendar is the most widely used Calendar in the world today

Centuries in Astronomical Year Numbering

Astronomical year numbering, used by astronomers) includes a year zero. Astronomical year numbering is based on AD ( Anno Domini)/CE ( Common Era) year numbering but follows normal Decimal Integer numbering more strictly Historically Astronomy was more concerned with the classification and description of phenomena in the sky while Astrophysics attempted to explain these phenomena Consequently, the first century in these calendars may designate the years 0 to 99 as the first century. and to regard 2000 as the first year of the twenty-first century, the year 0 corresponding then to Georgian year 1 BC.

References

"The Battle of the Centuries", Ruth Freitag, U. S. Government Printing Office. Available from the Superintendent of Documents, P. O. Box 371954, Pittsburgh, PA 15250- 7954. Cite stock no. 030-001-00153-9.

See also

• List of centuries