The recognition of Sunday (the day of Phœbus and Mithras as well as the Lord’s Day) by the emperor Constantine... may have led Christians of the fourth century to feel the appropriateness of making the birthday of the Son of God coincide with that of the physical sun.
Kuna keiser Constantinus tunnustas pühapäeva (mis oli nii Phoibose ja Mithra kui ka Issanda päev).. tundsid neljanda sajandi kristlased ehk olevat kohane ühendada Jumala Poja sünnipäev päikese sünnipäevapühaga.