Nemean Games
Regarding the time of year the Nemean Games were celebrated, the Scholiast on Pindar merely states that they were held on the 12th of the month of Panemos, though in another passage he makes a statement which contradicts this assertion. Pausanias speaks of winter Nemean Games, and distinguishes them from others which were held in summer. It seems that for a time the celebration of the Nemean Games was neglected, and that they were revived in Olympiad 51.4 (573 BC), from which time Eusebius dates the first Nemead. Henceforth they were for a long time celebrated regularly twice in every Olympiad, both at the start of every second Olympic year in the winter, and soon after the start of every fourth Olympic year in the summer. About the time of the Battle of Marathon it became customary in Argolis to reckon according to Nemeads.