Today we know prajApatI: as the sons of brahma and saraswatI as brahma’s wife. And kAla can mean rudra or kRSNa in addition to time itself.
dakSa was a prajāpati and the one who named the nakSatrANi. We can guess that the prajApati referenced below is dakSa, but we need to await more clues.
prajāpati is revered below as one who presides over time and as one who whose limbs are various time measures. prajāpati is the pro-genitor, the lord of all people or of all that are born. And he is embodied by time itself.
The next verse says that this knowledge of the lights (celestial) is being shared in order to determine the time of yagnyā: . While this is what all the scholars say, my mind says that the yagnyA: and other rituals were for marking time and astronomical events and not vice versa, at least by the ones who defined them.
The Rg vEda-anga jyOtiSam has an additional ślökam which reveres saraswatI and time itself, before explaining the knowledge-of-time of the great-souled lagadha.
Now, as we are aware, VJ does not discuss predictions for people. kAlagnyAna predicts the movements of the lights-in-the-sky… and this could be the knowledge of the future that the RSI: (seers) possessed.
And then as well as now saraswatI is the goddess of knowledge, always worshipped before teaching and learning.