Millenarian

a.	1.	Consisting of a thousand years; of or pertaining to the millennium, or to the Millenarians.
n.	1.	One who believes that Christ will personally reign on earth a thousand years; a Chiliast.

Noun	1.	millenarian - a person who believes in the coming of the millennium (a time of great peace and prosperity) Synonyms: chiliast, millenarist
Adj.	1.	millenarian - relating to or believing in the millennium of peace and happiness Synonyms: chiliastic

Leibnizian, Leibnizian optimist, Pollyanna, aspirant, aspirer, bright, cheerful, chiliast, chiliastic, couleur de rose, hopeful, hoper, irrepressible optimist, millennialist, millennialistic, millennian, optimist, optimistic, perfectibilist, perfectibilitarian, perfectionist, philosophical optimist, ray of sunshine, rose-colored, roseate, rosy, sunny, upbeat, utopian