Abstract
The traditional text of Thucydides, II. 1, dates the surprise of Plataea by the Thebans, which began the Peloponnesian war, έπì ΠυΘοδώρου τι δύο μνας ρχοντος Αθηναίοις. It has long been recognized that the two months are too short a time, and that the facts of the history demand four. The day cannot be precisely determined, but the narrative of Thucydides fixes it near the end of a lunar month, and the choice has lain between the new moons of March 8 and April 7, 431 B.C. Now that Meritt has shown that the year of Pythodorus was not intercalary and ended on July 2, the former must be accepted. Accordingly the Theban attack may be put on the night of, let us say, March 3, which by Attic reckoning would be the early hours of Anthesterion 27