They have a system of personality labels based on when someone is born, similar to our human system of horoscopes and zodiac signs. Theirs is instead based on what time of day someone is born and it's divided into four categories, described below.
Born 24:00-5:59 - Called, in Promilanian, "mibu a diadas" which means "infant of the night," stereotyped as not concerned about schedules, spontaneous and open-minded.
Born 6:00-11:59 - Called, in Promilanian, "mibu a edras" which means "infant of the rising sun," stereotyped as early, overexcited and high energy.
Born 12:00-17:59 - Called, in Promilanian, "mibu a medona" which means "infant of the midday," stereotyped as on-schedule, mature and obsessed with organization.
Born 18:00-23:59 - Called, in Promilanian, "mibu a septunus" which means "infant of the rising moon," stereotyped as late, laid-back and nonconfrontational.
While this practice began in Promilan, it has no connection to the Hothistic religion and is mostly just for funsies. The practice has spread throughout the solar system and the Cloudians kinda took it and ran with it, their stereotypes get much more specific.