AD 40

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

AD 40 in various calendars
Gregorian calendar	AD 40 XL
Ab urbe condita	793
Assyrian calendar	4790
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
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AD 40 (XL) was a leap year starting on Friday (link will display the full calendar) 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 denomination AD 40 for this year has been used since the Early Middle Ages, when the Anno Domini calendar era became the prevalent method in Europe for naming years.