kairos
A time when conditions are right for the accomplishment of a crucial action; the opportune and decisive moment.
The—so-called! friends—rational world. If only they, Mom&Dad&Buddy&Sis, dear-but-square ones, could but know the kairos, the supreme moment…
Where it comes from
Borrowed from Ancient Greek καιρός (kairós).
Adapted from the Wiktionary entry kairos (CC BY-SA 4.0).