55 BC

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Millennium: 1st millennium BC
55 BC in various calendars
Gregorian calendar55 BC
Ab urbe condita699
Ancient Egypt eraXXXIII dynasty, 269
- PharaohPtolemy XII Auletes, 26
Ancient Greek era181st Olympiad, year 2
Assyrian calendar4696
Balinese saka calendarN/A
Bengali calendar−647
Berber calendar896
Buddhist calendar490
Burmese calendar−692
Byzantine calendar5454–5455
Chinese calendar乙丑年 (Wood Ox)
2643 or 2436
    — to —
丙寅年 (Fire Tiger)
2644 or 2437
Coptic calendar−338 – −337
Discordian calendar1112
Ethiopian calendar−62 – −61
Hebrew calendar3706–3707
Hindu calendars
 - Vikram Samvat2–3
 - Shaka SamvatN/A
 - Kali Yuga3046–3047
Holocene calendar9946
Iranian calendar676 BP – 675 BP
Islamic calendar697 BH – 696 BH
Javanese calendarN/A
Julian calendarN/A
Korean calendar2279
Minguo calendar1966 before ROC
Nanakshahi calendar−1522
Seleucid era257/258 AG
Thai solar calendar488–489
Tibetan calendar阴木牛年
(female Wood-Ox)
72 or −309 or −1081
    — to —
(male Fire-Tiger)
73 or −308 or −1080

Year 55 BC was a year of the pre-Julian Roman calendar. At the time, it was known as the Year of the Consulship of Crassus and Pompey (or, less frequently, year 699 Ab urbe condita). The denomination 55 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.


By place[edit]

Roman Republic[edit]


  • August 22 or August 26 – Julius Caesar commands his first invasions of Britain, likely a reconnaissance-in-force expedition, in response to the Britons giving military aid to his Gallic enemies. Caesar retreats back to Gaul when the majority of his force is prevented from landing by storms.





  1. ^ Nic Field (2014). Osprey: Alesia 52 BC – The final struggle for Gaul, p. 14. ISBN 978-1-78200-922-1.