18 BC

Millennium: 1st millennium BC
Centuries:
Decades:
Years:
18 BC in various calendars
Gregorian calendar18 BC
XVIII BC
Ab urbe condita736
Ancient Greek era190th Olympiad, year 3
Assyrian calendar4733
Balinese saka calendarN/A
Bengali calendar−610
Berber calendar933
Buddhist calendar527
Burmese calendar−655
Byzantine calendar5491–5492
Chinese calendar壬寅年 (Water Tiger)
2680 or 2473
    — to —
癸卯年 (Water Rabbit)
2681 or 2474
Coptic calendar−301 – −300
Discordian calendar1149
Ethiopian calendar−25 – −24
Hebrew calendar3743–3744
Hindu calendars
 - Vikram Samvat39–40
 - Shaka SamvatN/A
 - Kali Yuga3083–3084
Holocene calendar9983
Iranian calendar639 BP – 638 BP
Islamic calendar659 BH – 658 BH
Javanese calendarN/A
Julian calendar18 BC
XVIII BC
Korean calendar2316
Minguo calendar1929 before ROC
民前1929年
Nanakshahi calendar−1485
Seleucid era294/295 AG
Thai solar calendar525–526
Tibetan calendar阳水虎年
(male Water-Tiger)
109 or −272 or −1044
    — to —
阴水兔年
(female Water-Rabbit)
110 or −271 or −1043

Year 18 BC was either a common year starting on Friday, Saturday or Sunday or a leap year starting on Saturday (link will display the full calendar) of the Julian calendar (the sources differ, see leap year error for further information) and a common year starting on Thursday of the Proleptic Julian calendar. At the time, it was known as the Year of the Consulship of Lentulus and Lentulus (or, less frequently, year 736 Ab urbe condita). The denomination 18 BC for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.