66 BC

66 BC in various calendars
Gregorian calendar	66 BC; LXVI BC
Ab urbe condita	688
Ancient Egypt era	XXXIII dynasty, 258
- Pharaoh	Ptolemy XII Auletes, 15
Ancient Greek era	178th Olympiad, year 3
Assyrian calendar	4685
Balinese saka calendar	N/A
Bengali calendar	−658
Berber calendar	885
Buddhist calendar	479
Burmese calendar	−703
Byzantine calendar	5443–5444
Chinese calendar	甲寅年 (Wood Tiger); 2632 or 2425; — to —; 乙卯年 (Wood Rabbit); 2633 or 2426
Coptic calendar	−349 – −348
Discordian calendar	1101
Ethiopian calendar	−73 – −72
Hebrew calendar	3695–3696
Hindu calendars
- Vikram Samvat	−9 – −8
- Shaka Samvat	N/A
- Kali Yuga	3035–3036
Holocene calendar	9935
Iranian calendar	687 BP – 686 BP
Islamic calendar	708 BH – 707 BH
Javanese calendar	N/A
Julian calendar	N/A
Korean calendar	2268
Minguo calendar	1977 before ROC; 民前1977年
Nanakshahi calendar	−1533
Seleucid era	246/247 AG
Thai solar calendar	477–478
Tibetan calendar	阳木虎年; (male Wood-Tiger); 61 or −320 or −1092; — to —; 阴木兔年; (female Wood-Rabbit); 62 or −319 or −1091

250 BC in various calendars
Gregorian calendar	250 BC; CCL BC
Ab urbe condita	504
Ancient Egypt era	XXXIII dynasty, 74
- Pharaoh	Ptolemy II Philadelphus, 34
Ancient Greek era	132nd Olympiad, year 3
Assyrian calendar	4501
Balinese saka calendar	N/A
Bengali calendar	−842
Berber calendar	701
Buddhist calendar	295
Burmese calendar	−887
Byzantine calendar	5259–5260
Chinese calendar	庚戌年 (Metal Dog); 2448 or 2241; — to —; 辛亥年 (Metal Pig); 2449 or 2242
Coptic calendar	−533 – −532
Discordian calendar	917
Ethiopian calendar	−257 – −256
Hebrew calendar	3511–3512
Hindu calendars
- Vikram Samvat	−193 – −192
- Shaka Samvat	N/A
- Kali Yuga	2851–2852
Holocene calendar	9751
Iranian calendar	871 BP – 870 BP
Islamic calendar	898 BH – 897 BH
Javanese calendar	N/A
Julian calendar	N/A
Korean calendar	2084
Minguo calendar	2161 before ROC; 民前2161年
Nanakshahi calendar	−1717
Seleucid era	62/63 AG
Thai solar calendar	293–294
Tibetan calendar	阳金狗年; (male Iron-Dog); −123 or −504 or −1276; — to —; 阴金猪年; (female Iron-Pig); −122 or −503 or −1275

Year 66 BC was a year of the pre-Julian calendar.

Events

Consuls: Manius Aemilius Lepidus and Lucius Volcatius Tullus.
Catiline accused of conspiring against the Roman Republic with Autronius and the younger Sulla (also in 63 during the Consulship of Cicero)
The alliance between Mithridates VI of Pontus and Tigranes II of Armenia is broken.
Battle of the Lycus — Pompey the Great decisively defeats Mithridates VI, effectively ending the Third Mithridatic War.
Gaius Antonius elected Roman Praetor.
The lex Manilia, supported by Cicero gives Pompey command over all of Asia.
Cicero becomes praetor of Sicily.