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Millennium: 1st millennium
Centuries: 1st century BC1st century2nd century
Decades: 10s  20s  30s  – 40s –  50s  60s  70s
Years: 37 38 394041 42 43
AD 40 in various calendars
Gregorian calendar AD 40
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(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
Korean calendar 2373
Minguo calendar 1872 before ROC
Nanakshahi calendar −1428
Seleucid era 351/352 AG
Thai solar calendar 582–583
Tibetan calendar 阴土猪年
(female Earth-Pig)
166 or −215 or −987
    — to —
(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[change | change source]

Roman Empire[change | change source]

  • 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. He also appoints 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[change | change source]

Asia[change | change source]

Africa[change | change source]

Births[change | change source]

Deaths[change | change source]