There are two Greek gods of time. One is known to all as CHRONOS, the god of continuous time. But “timing” was also known and important to the ancient Greeks and so they created the god of the “right time”, the “right moment”, the god of good opportunity and called him KAIROS. The right times cannot be planned and good opportunities come and go and most of them are only recognized when they are already over.

KAIROS was important in determining the right times for medical interventions, i.e. when treatment should be given or an herb should be swallowed. But of course he was also wanted for the right times, the good opportunities in all other areas of life.
To gain the favor of KAIROS one had to be attentive and skillful, because his head was hairless (bald) except for a forelock that had to be grasped. If the curl was taken, the opportunity was seized, KAIROS was held. Once the hands slipped off the smooth head, the opportunity was gone.
KAIROS (and the history attached to him) has been preserved in various languages and phrases. So KAIROS became OCCASIO in Latin and then OCCASIONE, OCCASION etc. In German we still have the phrase: to seize an opportunity by grasping the schop and thereby referring to the forelock of KAIROS. But English and French also speak of “seize” (seize, saisir).