AD 40 (XL) was a leap year starting on Friday of the Julian calendar. At the time, it was known as the Year of the Consulship of Augustus without colleague (or, less frequently, year 793 Ab urbe condita).

The 40s decade ran from January 1, AD 40, to December 31, AD 49. Claudius became Roman Emperor in 41, following the assassination of Caligula. In 43, he sent Aulus Plautius with four legions to Britain (Britannia), initiating the decades-long Roman conquest of Britain.

18 A.D. Publius Ovidius Naso (Ovid), poet of Heroides, Amores, and Metamorphoses dies. 27 A.D. Jesus is baptized by John the Baptist. 30 A.D. John the Baptist executed. 30 A.D. Crucifixion of Jesus ordered by Pilate. 34 A.D. The disciple Paul makes his first visit to Jerusalem.

40 AD. Caligula marches to the English Channel with the intention of invading Britain. Instead, the legions collect sea shells and he returns to Rome to celebrate a fabricated triumph. 40 AD. Birth of the Emperor Titus. Birth of the Roman general Gn. Julius Agricola, in the province of Gallia Narbonesis. 40 AD

What happened and who was notable in 40 AD? Browse important events, world leaders, notable birthdays, and tragic deaths from the year 40 AD.

Year 40 was a leap year starting on Friday of the Julian calendar. At the time, it was known as the Year of the Consulship of Augustus without colleague.

AD，网球术语，是占先（advantage）的缩写。 要看懂一场网球比赛，首先应该明白网球的“局（game）与盘（set）”。 在一“局”里，由一方发球，对于发球方来说这一局就是“发球局”。

Deep Dive: 40 AD to Present. The year 40 AD, or 1985 years ago, was a significant time in history. Let's break down this vast timespan: Time Calculations. Years: 1985; Months: 23820 months; Days: 725021 days (accounting for leap years) Hours: 17,400,510 hours; Minutes: 1,044,030,600 minutes; Seconds: 62,641,836,000 seconds

为什么网球比赛中的得分是15，30，40，AD，这样加的？AD是发球占先的缩写。 要看懂一场网球比赛，首先应该明白网球的“局（game）与盘（set）”。在一“局”里，由一方发球，对于发球方来说这一局就是“发球局”。在

AD 40 was a leap year starting on Friday of the Julian calendar. Major events include Caligula becoming a Roman Emperor, and his failed campaign to conquer Britain. The Quadi tribe settled in Moravia and Slovakia, and Vardanes I became the king of Parthia.