from Religious Tolerance.org site:
The Summer Solstice is also known as: Alban Heflin, Alben Heruin, All-couples day, Feast of Epona, Feast of St. John the Baptist, Feill-Sheathain, Gathering Day, Johannistag, Litha, Midsummer, Sonnwend, Thing-Tide, Vestalia, etc.
People around the world have observed spiritual and religious seasonal days of celebration during the month of June. Most have been religious holy days which are linked in some way to the summer solstice. On this day, typically JUN-21, the daytime hours are at a maximum in the Northern hemisphere, and night time is at a minimum. It is officially the first day of summer. It is also referred to as Midsummer because it is roughly the middle of the growing season throughout much of Europe.
"Solstice" is derived from two Latin words: "sol" meaning sun, and "sistere," to cause to stand still. This is because, as the summer solstice approaches, the noonday sun rises higher and higher in the sky on each successive day. On the day of the solstice, it rises an imperceptible amount, compared to the day before. In this sense, it "stands still."
(In the southern hemisphere, the summer solstice is celebrated in December, also when the night time is at a minimum and the daytime is at a maximum. We will assume that the reader lives in the Northern hemisphere for the rest of this essay.)
How people view solstice celebrations:
People view other religions in various ways, and thus treat the celebrations of other faiths differently:
For some people, religious diversity is a positive factor. They enjoy the variety of June celebrations, because it is evidence of wide range of of beliefs within our common humanity. They respect both their own religious traditions and those of other faiths for their ability to inspire people to lead more ethical lives.
Others reject the importance of all celebrations other than the holy day(s) recognized by their own religion. Some even reject their religion's traditional holy days if they are convinced that they have Pagan origins. This is a common occurrence with Easter and Christmas.
Some view other religions as being inspired, controlled, or even led by Satan. Thus the solstice celebrations of other religions are rejected because they are viewed as Satanic in origin.
Why does the summer solstice happen?
The seasons of the year are caused by the 23.5º tilt of the earth's axis. Because the earth is rotating like a top or gyroscope, the North Pole points in a fixed direction continuously -- towards a point in space near the North Star. But the earth is also revolving around the sun. During half of the year, the southern hemisphere is more exposed to the sun than is the northern hemisphere. During the rest of the year, the reverse is true. At noontime in the Northern Hemisphere the sun appears high in the sky during summertime, and low during winter. The time of the year when the sun reaches its maximum elevation occurs on the summer solstice -- the day with the greatest number of daylight hours. It typically occurs on, or within a day or two of, JUN-21 -- the first day of summer. The lowest elevation occurs about DEC-21 and is the winter solstice -- the first day of winter, when the night time hours reach their maximum.
Solstice at Stonehenge
Solstice at Astrological Musings