阳水马年 (male Water-Horse) 629 or 248 or −524 — to — 阴水羊年 (female Water-Goat) 630 or 249 or −523
Year 503 (DIII) was a common year starting on Wednesday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Volusianus and Dexicrates (or, less frequently, year 1256 Ab urbe condita). The denomination 503 for this year has been used since the early medieval period, when the Anno Dominicalendar era became the prevalent method in Europe for naming years.
May – Areobindus, Byzantine general (magister militum), is stationed as commander at Dara, with an army of 12,000 men to keep watch at the Persian stronghold of Nisibis (modern Turkey).
^John Binns, Ascetics and ambassadors of Christ: the monasteries of Palestine, 314-631. p.113; Frank R. Trombley, J. W. Watt, The chronicle of pseudo-Joshua the Stylite (the margin) p.108; Cyril of Scythopolis, Life of John the Hesychast, p.211. 15-20