40

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

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.

Events

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).

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.

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

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