propitious

propitious \pruh-PISH-uhs\, adjective:

1. Presenting favorable circumstances or conditions.
2. Favorably inclined; gracious; benevolent.

Example Quotes:

By the early 1500s rice was being planted on the Cape Verde island most propitious for agriculture, Santiago.
-- Judith A. Carney, Black Rice

It is hard to imagine a less propitious start to a marriage: in a single blow Vincent forfeited the trust of his wife, the respect of her family, and the means of his own support.
-- Matthew Sturgis, Aubrey Beardsley: A Biography

Example Sentences:

Though he didn't believe in luck, he considered the birth of the child propitious for the expedition's success.
-- Brought to you by the 3rd Generation Prius

Propitious derives from Latin propitius, "favorable."