As an introduction, and this may not be exactly correct, but in my mind the term “New Age", is derived from the idea of The Age of Aquarius. This idea denotes the processional change in the earth’s orientation of the visible zodiac. This movement into the sign Aquarius, suggests that humanity will actually start to behave like good humans.
“The Age” symbolically is a time in which humanity collectively cares about the needs of the people of the earth and of the earth itself, as compared to the age of Pisces, considered a time in which the earth was exploited and people were/are exploited for the benefit of a few.