The treatise Ad viduam iuniorem is one of the few works of St. John Chrysostom that can be dated within a space of two or three years. In general the opinion is that it was composed early in Chrysostom's diaconate, which is usually considered to comprise the years 381 to 386. The establishment of the date of this treatise and the identification of the emperors mentioned in it provide evidence for a terminal date of Chrysostom's birth. This latter question will be discussed briefly after the two primary difficulties have been treated.