To talk on Śankara is to unfold what Īśvara, the Lord, is. We do not look upon Śankara as an individual. In fact we do not look upon any teacher as an individua. When he is not a person, there cannot be jayanti, birthday celebration either! We do not have Īśvara Jayanti. We do have Rāma Jayanti or, Rāma Navami and Krishna Jayanti or, Gokulāstami.