From an informed source:
But this year, the solstice happens on Thursday, June 20 for places in North America west of the Central Time Zone, occurring at 11:04 P.M Mountain Daylight Time and 10:04 P.M. Pacific Daylight Time.Well, OK. No matter what time zone you're in... summer's here by the time you read this. Let's PARTY!
About that image... While we were living in Ol' Blighty The Second Mrs. Pennington and I had it on our agenda to travel down to Stonehenge to party at the summer solstice but we never got around to doing that, and more's the pity. Rumor has it the summer solstice at Stonehenge is one of the premier parties in all of creation. Yet another missed opportunity.