1

Year 1 of the Julian calendar, (I), 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, and less frequently, as year 754 ab urbe condita within the Roman Empire. The denomination 1 for this year has been in consistent use since the early medieval period when the anno Domini (AD) calendar era became the prevalent method in Europe for naming years. It was the first year of the Christian/Common era. The preceding year is 1 BC in the widely used Julian calendar, which does not have a "year zero".

1

Year 1 of the Julian calendar, (I), 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, and less frequently, as year 754 ab urbe condita within the Roman Empire. The denomination 1 for this year has been in consistent use since the early medieval period when the anno Domini (AD) calendar era became the prevalent method in Europe for naming years. It was the first year of the Christian/Common era. The preceding year is 1 BC in the widely used Julian calendar, which does not have a "year zero".