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Good morning, sunshine! Summer solstice celebrations welcome longest day of the year

Robert Atanasovski / AFP - Getty Images

People look at the horizon soon after sunrise on June 21, 2013, from the rocky crest filled with astronomical markers at the megalithic observatory of Kokino during the summer solstice. The ancient astronomic observatory, located about 100 kms northeast of Skopje, dates back to more than 4,000 years ago.

Lucas Jackson / Reuters

People take part in a group yoga practice on the morning of the summer solstice in New York's Times Square, on June 21, 2013. The "Solstice in Times Square" event on Friday brought out thousands of participants to celebrate the year's longest day in New York.

Lucas Jackson / Reuters

People take part in a group yoga practice on the morning of the summer solstice in New York's Times Square, on June 21, 2013. The "Solstice in Times Square" event on Friday brought out thousands of participants to celebrate the year's longest day.

Kerim Okten / EPA

Revelers gather to celebrate the eve of Summer Solstice within the circle of standing stones at Stonehenge, near Salisbury, Britain, June 20, 2013. Thousands annually meet at the 5,000 year old stone circle at Stonehenge to see in the sunrise of the Summer Solstice which marks the longest day of the year in the Northern Hemisphere.

Kerim Okten / EPA

Revelers gather to celebrate the eve of Summer Solstice within the circle of standing stones at Stonehenge, near Salisbury, Britain, on June 20, 2013.

Peter Schneider / EPA

As the weather heats up, families and friends head outdoors to soak up the sun