History.com - 6/18/13, History.com staff
Though a connection between the Celtic high priests and England's Stonehenge has never been reliably established, many people who identify as modern-day Druids still gather at the mighty monument every midsummer. (Credit: Andrew Dunn/Wikimedia Commons)
Ancient Greeks
According to certain iterations of the Greek calendar—they varied widely by region and era—the summer solstice was the first day of the year. Several festivals were held around this time, including Kronia, which celebrated the agriculture god Cronus. The strict social code was temporarily turned on its head during Kronia, with slaves participating in the merriment as equals or even being served by their masters. The summer solstice also marked the one-month countdown to the opening of the Olympic games.
Ancient Romans
In the days leading up to the summer solstice, ancient Romans celebrated the Vestalia festival, which paid tribute to Vesta, the goddess of the hearth. Rituals included the sacrifice of an unborn calf remove from its mother’s womb. This was the only time of the year when married women were allowed to enter the sacred temple of the vestal virgins and make offerings to Vesta there.
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