The terms anno Domini (AD) and before Christ (BC) are used to label or number years in the Julian and Gregorian calendars. The term anno Domini is Medieval Latin and means "in the year of the Lord", but is often presented using "our Lord" instead of "the Lord", taken from the full original phrase "anno Domini nostri Jesu Christi", which translates to "in the year of our Lord Jesus Christ".
AD 26 (XXVI) was a common year starting on Tuesday of the Julian calendar, the 26th Year of the Anno Domini (AD) designation, the 26th year of the 1st millennium, the 26th year of the 1st century, and the 6th year of the 3rd decade. At the time, it was known as the Year of the Consulship of Lentulus and Sabinus. The denomination AD 26 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 100s decade ran from January 1, 100, to December 31, 109.
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 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 33 (XXXIII) was a common year starting on Thursday of the Julian calendar. At the time, it was known in the Roman world as the Year of the Consulship of Ocella and Sulla. The denomination AD 33 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in the world for naming years.
AD 64 (LXIV) was a leap year starting on Sunday of the Julian calendar, the 64th Year of the Anno Domini designation, the 64th year of the 1st millennium, the 64th year of the 1st century, and the 4th year of the 7th decade. At the time, it was known as the Year of the Consulship of Bassus and Crassus. The denomination AD 64 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 107 (CVII) was a common year starting on Friday of the Julian calendar. At the time, it was known as the Year of the Consulship of Sura and Senico. The denomination 107 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 159 (CLIX) was a common year starting on Sunday of the Julian calendar. At the time in Roman territories, it was known as the Year of the Consulship of Quintillus and Priscus. The denomination 159 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 398 (CCCXCVIII) was a common year starting on Friday of the Julian calendar, the 395th Year of the Common Era (CE) and Anno Domini (AD) designations, the 398th year of the 1st millennium, the last 3 years of the 4th century, and the 9th and pre-final year of the 390s decade. At the time, it was known as the Year of the Consulship of Augustus and Eutychianus. The denomination 398 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 468 (CDLXVIII) was a leap year starting on Monday of the Julian calendar. At the time, it was known as the Year of the Consulship of Anthemius without colleague. The denomination 468 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 303 (CCCIII) was a common year starting on Friday of the Julian calendar. It was known in the Roman Empire as the Year of the Consulship of Valerius and Valerius. The denomination 303 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 176 (CLXXVI) was a leap year starting on Sunday of the Julian calendar. At the time, it was known as the Year of the Consulship of Proculus and Aper. The denomination 176 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 212 (CCXII) was a leap year starting on Wednesday of the Julian calendar. At the time, it was known as the Year of the Consulship of Asper and Camilius. The denomination 212 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 247 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Metellus and Buteo. The denomination 247 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.
Dionysius Exiguus was a 6th-century monk born in Scythia Minor. He was a member of a community of Scythian monks concentrated in Tomis, the major city of Scythia Minor. Dionysius is best known as the inventor of Anno Domini (AD) dating, which is used to number the years of both the Gregorian calendar and the (Christianised) Julian calendar. Almost all churches adopted his computus for the dates of Easter.
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, it is the year 2021 as per the Gregorian calendar, which numbers its years in the Western Christian era.
The Era of the Martyrs, also known as the Diocletian era, is a method of numbering years used by the Church of Alexandria beginning in the 4th century AD/CE and by the Coptic Orthodox Church of Alexandria from the 5th century to the present. Western Christians were aware of it but did not use it. It was named for the Roman Emperor Diocletian who instigated the last major persecution against Christians in the Empire. Diocletian began his reign on 20 November 284, during the Alexandrian year that began on 1 Thoth, the Egyptian New Year, or 29 August 284, so that date was used as the epoch: year one of the Diocletian era began on that date. This era was used to number the year in Easter tables produced by the Church of Alexandria.
The year zero does not exist in the Anno Domini (AD) system commonly used to number years in the Gregorian calendar and in its predecessor, the Julian calendar. In this system, the year 1 BC is followed by AD 1. However, there is a year zero in astronomical year numbering and in ISO 8601:2004, as well as in most Buddhist and Hindu calendars.
The Spanish era, sometimes called the era of Caesar, was a calendar era commonly used in the states of the Iberian Peninsula from the 5th century until the 15th, when it was phased out in favour of the Anno Domini (AD) system. The epoch of the Spanish era was 1 January 38 BC. To convert an Anno Domini date to the corresponding year in the Spanish era, add 38 to the Anno Domini year, such that Era 941 would be equivalent to AD 903. A date given in the Spanish era always uses the word era followed by a feminine ordinal number. This contrasts with the AD system that uses the masculine anno (year): i.e., era millesima octava versus anno millesimo octavo.
