Lunation n. The period of a synodic revolution of the moon, or the time from one new moon to the next; varying in length, at different times, from about 29¼ to 29 5/6 days, the average length being 29 d., 12h., 44m., 2.9s.
... rising up in our Throne to embrace you, we declare you our Ally and Confederate; and have ordered this Leaf to be sealed with our Imperial Signet, in our Royal City the Head of the World, the 8th Day of the third Lunation, and the 4th ... — The Spectator, Volumes 1, 2 and 3 - With Translations and Index for the Series • Joseph Addison and Richard Steele