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303 BC in various calendars
Gregorian calendar	303 BC; CCCIII BC
Ab urbe condita	451
Ancient Egypt era	XXXIII dynasty, 21
- Pharaoh	Ptolemy I Soter, 21
Ancient Greek era	119th Olympiad, year 2
Assyrian calendar	4448
Balinese saka calendar	N/A
Bengali calendar	−895
Berber calendar	648
Buddhist calendar	242
Burmese calendar	−940
Byzantine calendar	5206–5207
Chinese calendar	丁巳年 (Fire Snake); 2395 or 2188; — to —; 戊午年 (Earth Horse); 2396 or 2189
Coptic calendar	−586 – −585
Discordian calendar	864
Ethiopian calendar	−310 – −309
Hebrew calendar	3458–3459
Hindu calendars
- Vikram Samvat	−246 – −245
- Shaka Samvat	N/A
- Kali Yuga	2798–2799
Holocene calendar	9698
Iranian calendar	924 BP – 923 BP
Islamic calendar	952 BH – 951 BH
Javanese calendar	N/A
Julian calendar	N/A
Korean calendar	2031
Minguo calendar	2214 before ROC; 民前2214年
Nanakshahi calendar	−1770
Seleucid era	9/10 AG
Thai solar calendar	240–241
Tibetan calendar	阴火蛇年; (female Fire-Snake); −176 or −557 or −1329; — to —; 阳土马年; (male Earth-Horse); −175 or −556 or −1328

Millennium:	1st millennium BC
Centuries:	5th century BC; 4th century BC ; 3rd century BC;
Decades:	320s BC; 310s BC; 300s BC ; 290s BC; 280s BC;
Years:	306 BC; 305 BC; 304 BC; 303 BC ; 302 BC; 301 BC; 300 BC;

Year 303 BC was a year of the pre-Julian Roman calendar. At the time, it was known as the Year of the Consulship of Lentulus and Aventinensis (or, less frequently, year 451 Ab urbe condita). The denomination 303 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

Seleucid Empire

Seleucus I Nicator expands his kingdom throughout Persia as far east as India, but his advance is eventually halted by Chandragupta Maurya, the founder of the Maurya dynasty of India. In a pact concluded by the two leaders, Seleucus agrees to territorial concessions in exchange for 500 war-trained elephants.^[1]
Seleucus refounds the town of Orrhoa in northern Mesopotamia as a military colony and mixes Greek settlers with its eastern population. He names Edessa in memory of the ancient capital of Macedon.^{[citation needed]}

Greece

Cassander and Lysimachus persuade Seleucus and Ptolemy to join them in trying to destroy Antigonus.^{[citation needed]}
Demetrius Poliorcetes invades the Peloponnese and occupies Corinth, Sicyon, and Argos in the Peloponnese, and Achaea, Elis and almost all of Arcadia join his side.^{[citation needed]}

Italy

The citizens of Tarentum seek the help of the Spartan general, Cleonymus. He is able to pacify the Lucanians with the agreement of the Romans.^[2]

Births

Xiaowen of Qin, 34th Ruler of Qin (d. 251 BC)

Deaths

References

^ Roy, Kaushik (2015). Warfare in Pre-British India – 1500BCE to 1740CE. Abingdon: Routledge. p. 48. ISBN 978-1-31758-692-0.
^ Siculus, Diodorus. "104". Library. Vol. XIX.

[1] Roy, Kaushik (2015). Warfare in Pre-British India – 1500BCE to 1740CE. Abingdon: Routledge. p. 48. ISBN 978-1-31758-692-0.

[2] Siculus, Diodorus. "104". Library. Vol. XIX.

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