28 BC

Year 28 BC was either a common year starting on Saturday, Sunday or Monday or a leap year starting on Saturday or Sunday of the Julian calendar. At the time, it was known as the Year of the First Consulship of Octavian and Agrippa.

Millennium:	1st millennium BC
Centuries:	2nd century BC – 1st century BC – 1st century
Decades:	50s BC  40s BC  30s BC  – 20s BC –  10s BC  0s BC  0s
Years:	31 BC 30 BC 29 BC – 28 BC – 27 BC 26 BC 25 BC

28 BC in other calendars

Gregorian calendar	28 BC XXVII BC
Ab urbe condita	726
Ancient Greek era	188th Olympiad (victor)¹
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	壬辰年 (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 XXVII BC
Korean calendar	2306
Minguo calendar	1939 before ROC 民前1939年
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 — 阴水蛇年 (female Water-Snake) 100 or −281 or −1053

Events

• Gaius Julius Caesar Octavian becomes Roman Consul for the sixth time. His partner Marcus Vipsanius Agrippa becomes Consul for the second time.
• May 10 – The earliest dated record of a sunspot by Chinese astronomers.
• The Emilius comet is said to have crashed into modern day Pakistan.

Deaths

• Mariamme, wife of king Herod the Great (b. 48 BC)