Back Ҳ. ҟ. 28 Abkhazian 28 v.C. Afrikaans 28 aC AN 28 ق م Arabic 28 ق م ARZ 28 e.C. AST 28 v. Kr. BAR 28 да н.э. Byelorussian 28 да н. э. BE-X-OLD 28 г. пр.н.е. Bulgarian
| 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 |
| 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 |
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.