The Great Awakening refers to a number of periods of religious revival in American Christian history. Historians and theologians identify three, or sometimes four, waves of increased religious enthusiasm between the early 18th century and the late 20th century. https://en.wikipedia.org/wiki/Great_Awakening

Ephesians 5:14

For anything that becomes visible is light. Therefore it says, 'Awake, O sleeper, and arise from the dead, and Christ will shine on you'