Hilary's day in the Roman calendar is January 13, from which the name of Hilary term is derived at Oxford University and other institutions.
Editions of his writings were produced by Erasmus (Basel, 1523, 1526, 1528). An English translation by E. W. Watson appears in Nicene and Post-Nicene Fathers. Several of his works have appeared in Sources Chretiennes (i.e. commentaries on Psalm 118 and St. Matthew, his attack on the emperor Constantius, on the Mysteries and most recently, in three volumes, on the Trinity).
He was, perhaps, mentioned by Augustine as being the author of Ambrosiaster.
A vita of Hilary was written by Venantius Fortunatus c.550 but is not considered reliable. More trustworthy are the notices in Jerome (De vir. illus. 100), Sulpicius Severus (Chron. ii. 39-45) and in Hilary's own writings.
The fourth-century saint Hilary of Poitiers once pointed out that just as a coin is made by taking a piece of metal and stamping the icon of Caesar upon it, man is stamped with an icon of God. In some of us, this icon is blurry, like that of a coin whose image has been obscured through abrasive contact with other objects over the years. In others—the saints—the stamp of God is like the image on a freshly minted coin.
You may wish to give this prayer to God for Hilary, who was an icon of God:
Eternal Father, whose servant Hilary steadfastly confessed your Son Jesus Christ to be true God and true man: We beseech you to keep us firmly grounded in this faith; that we may rejoice to behold his face in heaven who humbled himself to bear our form upon earth, even the same your Son Jesus Christ our Lord, who lives and reigns with you and the Holy Spirit, one God, now and for ever.