An era is a commonly used word for long period of time. When used in science, for example geology, eras denote clearly defined periods of time of arbitrary but well defined length, such as for example the Mesozoic Era from 252 Ma–66 Ma, delimited by a start event and an end event. When used in social history, eras may for example denote a period of some monarch's reign. In colloquial language, eras denote longer spans of time, before and after which the practices or fashions change to a significant degree. When era is extended to a calendar system, it is known as a calendar era. In Sanskrit or Indian culture eras are known as Yugas.
Famous quotes containing the word era:
“It struck me that the movies had spent more than half a century saying, “They lived happily ever after” and the following quarter-century warning that they’ll be lucky to make it through the weekend. Possibly now we are now entering a third era in which the movies will be sounding a note of cautious optimism: You know it just might work.”
—Nora Ephron (b. 1941)
“The era of long parades past an official podium filled with cold faces is gone. Celebrating is now a right, not a duty.”
—Lothar De Maizière (b. 1940)
“It is not an era of repose. We have used up all our inherited freedom. If we would save our lives, we must fight for them.”
—Henry David Thoreau (1817–1862)