18 BC
| Millennium: | 1st millennium BC |
|---|---|
| Centuries: | 2nd century BC – 1st century BC – 1st century |
| Decades: | 40s BC 30s BC 20s BC – 10s BC – 0s BC 0s 10s |
| Years: | 21 BC 20 BC 19 BC – 18 BC – 17 BC 16 BC 15 BC |
| 18 BC by topic |
| Politics |
|---|
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| Categories |
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| Gregorian calendar | 18 BC |
| Ab urbe condita | 736 |
| Ancient Greek era | 190th Olympiad, year 3 |
| Assyrian calendar | 4733 |
| Bengali calendar | −610 |
| Berber calendar | 933 |
| Buddhist calendar | 527 |
| Burmese calendar | −655 |
| Byzantine calendar | 5491–5492 |
| Chinese calendar | 壬寅年 (Water Tiger) 2679 or 2619 — to — 癸卯年 (Water Rabbit) 2680 or 2620 |
| Coptic calendar | −301 – −300 |
| Discordian calendar | 1149 |
| Ethiopian calendar | −25 – −24 |
| Hebrew calendar | 3743–3744 |
| Hindu calendars | |
| - Vikram Samvat | 39–40 |
| - Shaka Samvat | N/A |
| - Kali Yuga | 3084–3085 |
| Holocene calendar | 9983 |
| Iranian calendar | 639 BP – 638 BP |
| Islamic calendar | 659 BH – 658 BH |
| Julian calendar | 18 BC |
| Korean calendar | 2316 |
| Minguo calendar | 1929 before ROC 民前1929年 |
| Seleucid era | 294/295 AG |
| Thai solar calendar | 525–526 |
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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.
Events
By place
Roman empire
- Caesar Augustus introduce the Lex Julia (Julian Laws):
- Lex Iulia de Ambitu: Penalising bribery when acquiring political offices.
- Lex Iulia de Maritandis Ordinibus: Limiting marriage across social class boundaries.