Litha History - Celebrating the Summer Solstice
An Ancient Solar Celebration:
Nearly every agricultural society has marked the high point of summer in some way, shape or form. On this date – usually around June 21 or 22 (or December 21/22 in the southern hemisphere) – the sun reaches its zenith in the sky. It is the longest day of the year, and the point at which the sun seems to just hang there without moving – in fact, the word “solstice” is from the Latin word solstitium, which literally translates to “sun stands still.” The travels of the sun were marked and recorded. Stone circles such as Stonehenge were oriented to highlight the rising of the sun on the day of the summer solstice.
Traveling the Heavens:
Although few primary sources are available detailing the practices of the ancient Celts, some information can be found in the chronicles kept by early Christian monks. Some of these writings, combined with surviving folklore, indicate that Midsummer was celebrated with hilltop bonfires and that it was a time to honor the space between earth and the heavens.
http://paganwiccan.about.com/od/lithathesummersolstice/p/Litha_History.htm