阴水羊年 (female Water-Goat) −150 or −531 or −1303 — to — 阳木猴年 (male Wood-Monkey) −149 or −530 or −1302
Year 277 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Rufinus and Brutus (or, less frequently, year 477 Ab urbe condita). The denomination 277 BC for this year has been used since the early medieval period, when the Anno Dominicalendar era became the prevalent method in Europe for naming years.
Pyrrhus captures Eryx, the strongest Carthaginian fortress in Sicily. This prompts the rest of the Carthaginian-controlled cities in Sicily to defect to Pyrrhus.