On This Day: The Sacred Summer Truce Begins
Late May in Athens: Olive branches wave from every gate. The sacred truce of summer—the hieromenia—has begun.

Johannes Vermeer — "A Maid Asleep" (ca. 1656–57), public domain
Olive boughs sent a message.
In late May, the heralds of Athens—spondophoroi—carried olive branches to announce the hieromenia, the sacred truce. No army could attack. Anyone who broke the peace risked the wrath of the gods and exile from all festivals.
A pan-Hellenic pause for pilgrimage.
The truce meant pilgrims could travel safely between city-states to attend the great games or consult oracles. For a month or more, rivalries paused—the Olympic stadium or Delphi’s temple suddenly more important than battle lines.
With the hieromenia, war came to a halt across Greece, letting pilgrims travel safely to religious games and festivals.