81 BC

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Millennium: 1st millennium BC
Centuries:
Decades:
Years:
81 BC in various calendars
Gregorian calendar 81 BC
LXXX BC
Ab urbe condita 673
Ancient Egypt era XXXIII dynasty, 243
- Pharaoh Ptolemy IX Lathyros, 8
Ancient Greek era 174th Olympiad, year 4
Assyrian calendar 4670
Balinese saka calendar N/A
Bengali calendar −673
Berber calendar 870
Buddhist calendar 464
Burmese calendar −718
Byzantine calendar 5428–5429
Chinese calendar 己亥(Earth  Pig)
2616 or 2556
     to 
庚子年 (Metal  Rat)
2617 or 2557
Coptic calendar −364 – −363
Discordian calendar 1086
Ethiopian calendar −88 – −87
Hebrew calendar 3680–3681
Hindu calendars
 - Vikram Samvat −24 – −23
 - Shaka Samvat N/A
 - Kali Yuga 3020–3021
Holocene calendar 9920
Iranian calendar 702 BP – 701 BP
Islamic calendar 724 BH – 723 BH
Javanese calendar N/A
Julian calendar N/A
Korean calendar 2253
Minguo calendar 1992 before ROC
民前1992年
Nanakshahi calendar −1548
Seleucid era 231/232 AG
Thai solar calendar 462–463
Tibetan calendar 阴土猪年
(female Earth-Pig)
46 or −335 or −1107
     to 
阳金鼠年
(male Iron-Rat)
47 or −334 or −1106

Year 81 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Decula and Dolabella (or, less frequently, year 673 Ab urbe condita ). The denomination 81 BC for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

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The Julian calendar, proposed by Julius Caesar in 708 Ab urbe condita (AUC) (46 BC), was a reform of the Roman calendar. It took effect on 1 January 709 AUC (45 BC), by edict. It was designed with the aid of Greek mathematicians and Greek astronomers such as Sosigenes of Alexandria.

Roman calendar Calendar used by the Roman Kingdom and Roman Republic

The Roman calendar was the calendar used by the Roman kingdom and republic. The term often includes the Julian calendar established by the reforms of the dictator Julius Caesar and emperor Augustus in the late 1st century BC and sometimes includes any system dated by inclusive counting towards months' kalends, nones, and ides in the Roman manner. The term usually excludes the Alexandrian calendar of Roman Egypt, which continued the unique months of that land's former calendar; the Byzantine calendar of the later Roman Empire, which usually dated the Roman months in the simple count of the ancient Greek calendars; and the Gregorian calendar, which refined the Julian system to bring it into still closer alignment with the tropical year.

Year 12 BC was either a common year starting on Saturday, Sunday or Monday or a leap year starting on Sunday of the Julian calendar and a common year starting on Friday of the Proleptic Julian calendar. At the time, it was known as the Year of the Consulship of Messalla and Quirinius. The denomination 12 BC for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

1st century BC Century

The 1st century BC, also known as the last century BC, started on the first day of 100 BC and ended on the last day of 1 BC. The AD/BC notation does not use a year zero; however, astronomical year numbering does use a zero, as well as a minus sign, so "2 BC" is equal to "year –1". 1st century AD follows.

AD 1 Calendar year

AD 1 (I), 1 AD or 1 CE is the epoch year for the Anno Domini calendar era. It was the first year of the Common Era (CE), of the 1st millennium and of the 1st century. It was a common year starting on Saturday or Sunday, a common year starting on Saturday by the proleptic Julian calendar, and a common year starting on Monday by the proleptic Gregorian calendar. In its time, year 1 was known as the Year of the Consulship of Caesar and Paullus, named after Roman consuls Gaius Caesar and Lucius Aemilius Paullus, and less frequently, as year 754 AUC within the Roman Empire. The denomination "AD 1" for this year has been in consistent use since the mid-medieval period when the anno Domini (AD) calendar era became the prevalent method in Europe for naming years. It was the beginning of the Christian/Common era. The preceding year is 1 BC; there is no year 0 in this numbering scheme. The Anno Domini dating system was devised in AD 525 by Dionysius Exiguus.

AD 4 (IV) was a common year starting on Wednesday or a leap year starting on Tuesday of the Julian calendar and a leap year starting on Tuesday of the Proleptic Julian calendar. At the time, it was known as the Year of the Consulship of Catus and Saturninus. The denomination "AD 4" for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

AD 21 (XXI) was a common year starting on Wednesday of the Julian calendar. At the time, it was known as the Year of the Consulship of Tiberius and Drusus. The denomination AD 21 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

70 BC Calendar year

Year 70 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Magnus and Dives. The denomination 70 BC for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

Ides of March Day on the Roman calendar that corresponds to 15 March

The Ides of March is the 74th day in the Roman calendar that corresponds to 15 March. It was marked by several religious observances and was notable for the Romans as a deadline for settling debts. In 44 BCE, it became notorious as the date of the assassination of Julius Caesar which made the Ides of March a turning point in Roman history.

Year 2 BC was a common year starting on Thursday or Friday of the Julian calendar and a common year starting on Wednesday of the Proleptic Julian calendar. At the time, it was known as the Year of the Consulship of Augustus and Silvanus. The denomination 2 BC for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

Year 8 BC was either a common year starting on Friday or Saturday or a leap year starting on Thursday of the Julian calendar and a common year starting on Wednesday of the Proleptic Julian calendar. At the time, it was known as the Year of the Consulship of Censorinus and Gaius Asinius. The denomination 8 BC for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

Year 46 BC was the last year of the pre-Julian Roman calendar. At the time, it was known as the Year of the Consulship of Caesar and Lepidus. The denomination 46 BC for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

Year 63 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Cicero and Hybrida. The denomination 63 BC for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

Year 110 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Rufus and Albinus. The denomination 110 BC for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

19 BC Calendar year

Year 19 BC was either a common year starting on Thursday, Friday or Saturday or a leap year starting on Thursday or Friday of the Julian calendar and a common year starting on Wednesday of the Proleptic Julian calendar. At the time, it was known as the Year of the Consulship of Saturninus and Vespillo. The denomination 19 BC 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.

140 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Sapiens and Caepio and the First Year of Jianyuan. The denomination 140 BC for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

Year 137 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Porcina and Mancinus and the Fourth Year of Jianyuan. The denomination 137 BC for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

Year 399 BC was a year of the pre-Julian Roman calendar. At the time, it was known as the Year of the Tribunate of Augurinus, Longus, Priscus, Cicurinus, Rufus and Philo. The denomination 399 BC for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

The year 673 BC was a year of the pre-Julian Roman calendar. In the Roman Empire, it was known as year 81 Ab urbe condita. The denomination 673 BC for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

A calendar era is the period of time elapsed since one epoch of a calendar and, if it exists, before the next one. For example, the Gregorian calendar numbers its years in the Western Christian era.

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