One luminary is the sovereign of the day, and it is like unto the unquenchable, unfailing, inextinguishable and uninterrupted light of Thine Only-begotten Son, which will be revealed to Thy righteous ones in the age to come, where there are no days, no nights, no months and no weeks, and hours, and no periods of time, no rotation of years and ages, but there is only the Lord and only His Name.
Life of St. Gregory the Illuminator of Armenia Agathangelos, History of the Aremnians, 91.