St. Sophia's birth date is April 30th and her death date is July 13th.
St. Micahel is an archangel and will never die.
Matthew died as a martyr, supposedly in Ethiopia, but the manner of his death and date are not known.
Little is known about St. Valentine of Rome, including his birth date, date of death and names of his parents.
The date of St. Anne's death is not known but it occurred sometime early in the first century AD.
St. Peter was martyred about the year 64 by crucifixion on an up-side-down cross. We do not know the exact date.
Saint Leodegariu (St. Leger) was murdered in 678 in the woods near Sarcing, Somme, France. The precise date is not known.
I really am not sure what you are asking as your question is unclear. St. Jude was martyred in Persia by being beaten to death and then beheaded. We do not know the date.
St. Rebecca the Martyr was killed in the 3rd century in Alexandria, Egypt. There is no exact information on her date of birth or death.
St. Michael is an archangel and angels do not die.
The date has no special significance other than it was the day assigned as the feast day of St. George. We do not know his birth date nor the date of his death.
Matthew died as a martyr, supposedly in Ethiopia, but the manner of his death and date are not known.