28 BC

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Millennium: 1st millennium BC
28 BC in various calendars
Gregorian calendar 28 BC
Ab urbe condita 726
Ancient Greek era 188th Olympiad (victor
Assyrian calendar 4723
Balinese saka calendar N/A
Bengali calendar −620
Berber calendar 923
Buddhist calendar 517
Burmese calendar −665
Byzantine calendar 5481–5482
Chinese calendar 壬辰(Water Dragon)
2669 or 2609
    — to —
癸巳年 (Water Snake)
2670 or 2610
Coptic calendar −311 – −310
Discordian calendar 1139
Ethiopian calendar −35 – −34
Hebrew calendar 3733–3734
Hindu calendars
 - Vikram Samvat 29–30
 - Shaka Samvat N/A
 - Kali Yuga 3073–3074
Holocene calendar 9973
Iranian calendar 649 BP – 648 BP
Islamic calendar 669 BH – 668 BH
Javanese calendar N/A
Julian calendar 28 BC
Korean calendar 2306
Minguo calendar 1939 before ROC
Nanakshahi calendar −1495
Seleucid era 284/285 AG
Thai solar calendar 515–516
Tibetan calendar 阳水龙年
(male Water-Dragon)
99 or −282 or −1054
    — to —
(female Water-Snake)
100 or −281 or −1053

Year 28 BC was either a common year starting on Saturday, Sunday or Monday or a leap year starting on Saturday or Sunday (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 Saturday of the Proleptic Julian calendar. At the time, it was known as the Year of the First Consulship of Octavian and Agrippa (or, less frequently, year 726 Ab urbe condita). The denomination 28 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]

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  • May 10 – The earliest dated record of a sunspot by Chinese astronomers.[2]
  • The Emilius comet is said to have crashed into modern day Pakistan.




  1. ^ "LacusCurtius • Res Gestae Divi Augusti (II)". penelope.uchicago.edu. Retrieved 2017-02-22. 
  2. ^ "The Observation of Sunspots". UNESCO Courier. 1988. Archived from the original on 2012-06-28. Retrieved 2010-07-14.