auspicious \aw-SPISH-uhs\ (adjective) - 1 : Giving promise of success, prosperity, or happiness; predicting good; as, "an auspicious beginning." 2 : Prosperous; fortunate; as, "auspicious years."
"The rest of that auspicious day when father answered the call of his prince was od for we were both elated at how quickly the muster had been made and then suddenly bereft of important tasks to be done." Anne McCaffrey, 'If Wishes Were Horses'
Auspicious derives from Latin auspicium, "an omen, a sign," from auspex, "one who observes or looks at the habits of birds for purposes of divination," from avis, "bird" + specere, "to look, to look at."