noun
Julian calendar
The calendar introduced by Julius Caesar, used in Europe until the Gregorian reform. In Japanese contexts, often appears in historical or astronomical discussions.
ロシア革命はユリウス暦で十月に起きた。
The Russian Revolution occurred in October according to the Julian calendar.
The Gregorian calendar, which replaced the Julian calendar in most countries. ユリウス暦 is the older system.
From ユリウス (Julius, from Latin Iulius) + 暦 (calendar). Named after Julius Caesar, who introduced the calendar in 45 BCE.