The summer solstice is the first official day of summer and the longest day of the year. Getty Images / Mario Tama

夏至是夏天正式开始的第一天，也是一年之中时间最长的一天。

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A man ues a camera on a rocky crest filled with astronomical markers at the megalithic observatory of Kokino, soon after sunrise, early on June 21, 2010 — the day of the summer solstice.

2010年6月21日清晨，一个人正在将摄影机架在一座遍布岩石、名为kokino的古天文台上，很快日出就出现在眼前，夏至来临了。

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Which brings up a common question: If the summer solstice is the longest day of the year, why are the dog days of August typically hotter?

这里要提一个共同的问题：如果夏至是一年之中白天最长的一天，为什么8月份的三伏天通常会更热一些？

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Now, although a popular tourist attraction by day, it retains some of its spiritual identity annually on the summer solstice as visitors come from all over the world to experience sunrise together.

UNESCO: UK National Commission for UNESCO - Longest crowds for the longest day, as Stonehenge solstice visitors reach 23,000