Year 46 BC was the last year of the pre-Julian Roman calendar. At the time, it was known as the Year of the Consulship of Caesar and Lepidus.
|Millennium:||1st millennium BC|
|Centuries:||2nd century BC – 1st century BC – 1st century|
|Decades:||70s BC 60s BC 50s BC – 40s BC – 30s BC 20s BC 10s BC|
|Years:||49 BC 48 BC 47 BC – 46 BC – 45 BC 44 BC 43 BC|
|Gregorian calendar||46 BC|
|Ab urbe condita||708|
|Ancient Egypt era||XXXIII dynasty, 278|
|- Pharaoh||Cleopatra VII, 6|
|Ancient Greek era||183rd Olympiad, year 3|
|Balinese saka calendar||N/A|
|Chinese calendar||甲戌年 (Wood Dog)|
2651 or 2591
— to —
乙亥年 (Wood Pig)
2652 or 2592
|Coptic calendar||−329 – −328|
|Ethiopian calendar||−53 – −52|
|- Vikram Samvat||11–12|
|- Shaka Samvat||N/A|
|- Kali Yuga||3055–3056|
|Iranian calendar||667 BP – 666 BP|
|Islamic calendar||688 BH – 686 BH|
|Julian calendar||46 BC|
|Minguo calendar||1957 before ROC|
|Seleucid era||266/267 AG|
|Thai solar calendar||497–498|
81 or −300 or −1072
— to —
82 or −299 or −1071
- Titus Labienus defeated Julius Caesar in the Battle of Ruspina.
- Julius Caesar defeated the combined army of Pompeian followers and Numidians at Thapsus.
- Caesar leaves for Farther Hispania to deal with rebellion in Rome.
- Caesar changes the Roman calendar to create the Julian calendar. The Julian Calendar remains the standard in the western world until the Gregorian Calendar in 1582.
- Caesar appoints his nephew Octavian his heir.
- for more information, see Category:46 BC births.
- Publius Quinctilius Varus, Roman politician (d. 9 AD)
- for more information, see Category:46 BC deaths.
- Cato the Younger (Marcus Porcius Cato) (b. 95 BC)
- Metellus Scipio (b. c. 100 BC)
- Vercingetorix, Gaul leader