(chronology) The secular equivalent of anno Domini and the Christian Era, the internationally recognized method of numbering years on the Gregorian calendar.

(geology, Paleontology) A subdivision of geologic time that divides an eon into smaller timeframes.

The current date era beginning approximately 2000 years ago in the Gregorian calendar, based on the (assumed) birth of Jesus Christ.

Alternative form of Common Era

Synonym of Common Era

epoch-making

plural of era name

The regnal year, reign period, or regnal title used when traditionally numbering years in an emperor's reign and naming certain Chinese rulers.

Synonym of modern period or modern history (the period following postclassical history, in Europe known as the "Middle Ages", spanning from about 1500 to the present).

(historical) A period of widespread social activism and political reform across the United States that spanned the 1890s to the 1920s.