The Relationship Between King David's Death and Shavuot

The sages reasoned David's days could not be considered complete unless he lived out the full number of his allotted years. And that's why it's a good sign when someone dies on their birthday. Luke's first century Acts of the Apostles also seems to hint toward an association between King David's death and Shavuot. The book concludes by telling us about the birth of David. It says, Anteboas was born Obid and to Obid was born Jesse and to Jesse David.