auspicious
adj.showing that something is likely to be successful in the future. You use this to describe a positive start to a project or event.
adj.suggesting that future success is likely; attended by favorable circumstances. Often used to describe the beginning of an endeavor or a specific sign.
“Winning the first game was an auspicious start to the season.”
“The clear blue skies provided an auspicious beginning for the outdoor wedding ceremony.”
“Despite the initial funding difficulties, the project's auspicious launch in the international market suggested a highly profitable fiscal year ahead.”
Typically used attributively before a noun like 'start', 'beginning', or 'sign'.
“In the centuries that followed, Kailash became known as a particularly auspicious place to meditate and to visit on pilgrimage.”
From auspice + -ious, from Latin auspicium (“augury”), from auspex (“augur”), possibly via French.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.