Mellifluous
Both.
The birth time for the charts are noted when the child is born but the first overall life reading is usually done when the kid is 2 and a half years old. This reading gives an outlook of how overall the life of the kid would be.
Later on whenever need be the astrological readings are done for specific advices (just like in Tarot) and these are based on the horoscope as well as the current planetary positions.
So cool! Thanks for answering!