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Millennium: 1st millennium
Centuries: 1st century BC1st century2nd century
Decades: 20s BC  10s BC  0s BC  – 0s –  10s  20s  30s
1 in other calendars
Gregorian calendar 1
Ab urbe condita 754
Armenian calendar N/A
Assyrian calendar 4751
Bahá'í calendar -1843–-1842
Bengali calendar -592
Berber calendar 951
English Regnal year N/A
Buddhist calendar 545
Burmese calendar -637
Byzantine calendar 5509–5510
Chinese calendar 庚申
— to —
Coptic calendar -283–-282
Ethiopian calendar -7–-6
Hebrew calendar 3761–3762
Hindu calendars
 - Vikram Samvat 57–58
 - Shaka Samvat N/A
 - Kali Yuga 3102–3103
Holocene calendar 10001
Iranian calendar 621 BP – 620 BP
Islamic calendar 640 BH – 639 BH
Japanese calendar
Korean calendar 2334
Minguo calendar 1911 before ROC
Thai solar calendar 544

The year 1 (I) was a common year starting on Saturday[1] of the Julian calendar. The year started on a Monday[2] in the Gregorian calendar. It was the first year of the 1st century and 1st millennium.

It is one of only seven years to use just one Roman numeral. The seven are 1 AD (I), 5 AD (V), 10 AD (X), 50 AD (L), 100 AD (C), 500 AD (D), and 1000 AD (M).

At the time, it was known as the Year of the Consulship of Caesar and Paullus. The denomination 1 for this year has been used since the early medieval period, when the Anno Domini calendar era became the main method in Europe for naming years. The year before this is 1 BC in the widely used Julian calendar.


By place

Roman Empire

A bust of Tiberius.
The World in year one.




By topic

Arts and sciences


  • Birth of Jesus, as assigned by Dionysius Exiguus in his anno Domini era according to at least one scholar.[4][5] However, most scholars think Dionysius placed the birth of Jesus in the previous year, 1 BC.[4][5] Despite this, most modern scholars do not consider Dionysius' calculations authoritative. They placed the event several years earlier (see Chronology of Jesus).[6]




  1. " - 1". 2011 [last update]. Retrieved August 3, 2011.
  2. "year 1 - Wolfram|Alpha". 2011 [last update]. Retrieved August 4, 2011.
  3. The silkroad foundation's silk road chronology Archived 17 June 2009 at WebCite
  4. 4.0 4.1 Georges Declercq, Anno Domini: The origins of the Christian Era (Turnhout, Belgium: Brepols, 2000), pp.143–147.
  5. 5.0 5.1 G. Declercq, "Dionysius Exiguus and the introduction of the Christian Era", Sacris Erudiri 41 (2002) 165–246, pp.242–246. Annotated version of a portion of Anno Domini.
  6. James D. G. Dunn, Jesus Remembered, Eerdmans Publishing (2003), page 324.
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