Rabi al-Awwal 17 - birth of Prophet Muhammad SA and 6th Imam Ja’far as-Sadiq AS were both born on the same day. Sunnis believe that the Prophet SAW was born on Rabi al-Awwal 12, which is the day of migration to the Holy City of Madina:
Some Shias and some Sunnis celebrate Unity Week, emphasizing the Prophet Muhammad SA during the week containing both Rabi al-Awwal 12 and Rabi al-Awwal 17. May Allah accept your remembrance of Prophet Muhammad SA and Imam Sadiq AS on this blessed day. Congratulations!