40

This page is about the year 40. For the actual number, see 40 (number).

Year 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.

Millennium:	1st millennium
Centuries:	1st century BC – 1st century – 2nd century
Decades:	10s  20s  30s  – 40s –  50s  60s  70s
Years:	37 38 39 – 40 – 41 42 43

AD 40 in other calendars

Gregorian calendar	AD 40 XL
Ab urbe condita	793
Assyrian calendar	4790
Balinese saka calendar	N/A
Bengali calendar	−553
Berber calendar	990
Buddhist calendar	584
Burmese calendar	−598
Byzantine calendar	5548–5549
Chinese calendar	己亥年 (Earth Pig) 2736 or 2676     — to — 庚子年 (Metal Rat) 2737 or 2677
Coptic calendar	−244 – −243
Discordian calendar	1206
Ethiopian calendar	32–33
Hebrew calendar	3800–3801
Hindu calendars
- Vikram Samvat	96–97
- Shaka Samvat	N/A
- Kali Yuga	3140–3141
Holocene calendar	10040
Iranian calendar	582 BP – 581 BP
Islamic calendar	600 BH – 599 BH
Javanese calendar	N/A
Julian calendar	AD 40 XL
Korean calendar	2373
Minguo calendar	1872 before ROC 民前1872年
Nanakshahi calendar	−1428
Seleucid era	351/352 AG
Thai solar calendar	582–583
Tibetan calendar	ས་མོ་ཕག་ལོ་ (female Earth-Boar) 166 or −215 or −987     — to — ལྕགས་ཕོ་བྱི་བ་ལོ་ (male Iron-Rat) 167 or −214 or −986

Events

Roman Empire

• The emperor Caligula is consul without colleague.
• Caligula starts a campaign to conquer Britain. It fails miserably. He names himself the winner.
• Noricum and Mauretania are added into the Roman Empire.
• Caligula reforms the principatus into a Hellenistic Autocracy. He distributes honors carelessly, declares himself a god and orders that all the heads of the Greek deity statues be replaced by his. According to legend, this is when he appointed his horse, Incitatus, a senator.
• Approximate date of start of construction on the Pont du Gard aqueduct in Gallia Narbonensis.
• Philo teaches that all men are born free.
• An early Christian church is erected at Corinth (most probable date).

Europe

• The Germanic Quadi tribe begin settling in present-day Moravia and Slovakia.

Asia

• Vardanes I becomes king of Parthia. He was opposed by his brother Gotarzes II.
• The Vietnamese Trung sisters rebel against the rule of the Chinese Emperor Guangwu of Han.

Africa

• Christianity comes to Egypt. Mark the Evangelist founds the Coptic Orthodox Church as the first pope.

Births

• July 13 – Gnaeus Julius Agricola, Roman governor of Britain (d. 93 AD)
• Pedanius Dioscorides, Greek physician (approximate date) (d. 90 AD)
• Frontinus, Roman general and military author (approximate date) (d. 103)
• Dio Chrysostom, Greek philosopher and historian (approximate date d. c. 120)
• Claudia Octavia, daughter of Claudius and Messalina (d. 62)
• Empress Ma of the Han Dynasty (d. 79)

Deaths

• January – Gnaeus Domitius Ahenobarbus, husband of Agrippina the younger, brother-in-law of Caligula (b. 17 BC)
• Ptolemy of Mauretania (b. 1 BC)