Edited from a variety of translations (mentioned in the preface) by H. R. Percival
Emperors.--Constantius and Constans.
Introduction on the date of the synod.
Note on the text of the canons.
The Canons with the Ancient Epitome and Notes.
Other Acts of the Synod.
Excursus as to this synod's claim to ecumenical character.
Introduction on the Date of the Council.
(Hefele, Hist. Councils, Vol. II., pp. 86 et seqq.)
Our inquiries concerning the Synod of Sardica must begin with a chronological examination of the date of this assembly. Socrates and Sozomen place it expressly in the year 347 a.d., with the more precise statement that it was held under the Consuls Rufinus and Eusebius in the eleventh year after the death of Constantine the Great, therefore after the 22d of May, 347, according to our way of reckoning.
This was the most general view until, rather more than a hundred years ago, the learned Scipio Maffei discovered at Verona, the fragment of a Latin translation of an old Alexandrian chronicle (the Historia Acephala), and edited it in the third volume of the Osservazioni Litterarii in 1738. This fragment contains the information that on the 24th Phaophi (October 21), under the Consuls Constantius IV. and Constans II., in the year 346, Athanasius had returned to Alexandria from his second exile. As it is universally allowed, however, as we shall presently show more clearly, that this return certainly only took place about two years after the Synod of Sardica, Mansi hence saw the necessity of dating this synod as early as the year 344. In this he is confirmed by St. Jerome, in the continuation of the Eusebian chronicle, who, in accordance with the Historia Acephala, has assigned the return of St. Athanasius to the tenth year of the reign of the Emperor Constantius, in 346.
Reference address : https://www.elpenor.org/ecumenical-councils/sardica-343.asp