Annaprasanam should be performed in the sixth month. Ayushya Homam is traditionally performed on the day the child completes one full year. Therefore, Annaprasanam is meant to be done beforehand, and Ayushya Homam afterwards. If both are to be performed on the same day, it is customary to complete the Ayushya Homam first and then give that sacrificial offering (Prasadam) as the Annaprasanam. In such a scenario, it can even be done afterwards.