Timeline

1959

 * Yondu is born. However, he's sold into slavery as a baby by his parents.

1979

 * Gamora is born.

Late December

 * Peter Quill, son of Meredith and Ego, is born.

1988

 * Meredith dies of brain cancer caused to her by Ego planting a tumor in her brain.
 * Peter Quill is abducted from Earth. Yondu keeps the boy Peter and raises him as his own.