It is interesting to me that the Church doesn’t typically celebrate the earthly birthdays of its saints but their Heavenly birthdays, the days they died and entered Heaven. There are two exceptions to that, Mary’s and John the Baptist’s births. As I understand it, the Catholic church teaches that this is because they were born without Original sin. As a Lutheran we don’t teach or believe that but we still commemorate the birth of St. John the Baptist today.
“And you, child, will be called the prophet of the Most High;
for you will go before the Lord to prepare his ways,
to give knowledge of salvation to his people
in the forgiveness of their sins,
because of the tender mercy of our God,
whereby the sunrise shall visit us from on high
to give light to those who sit in darkness and in the shadow of death,
to guide our feet into the way of peace.” Luke 1:76-79
