TIME takes a look at how people across the Northern Hemisphere are getting ready to greet the long, hot days ahead.
Happy First Day of Summer
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A Bengal tiger is hosed down by a zookeeper on a hot summer day at the Birsa Munda Zoological Park in Ranchi, India, on May 30, 2012. Zoo authorities are helping the animals cope with temperatures in excess 104 degrees Fahrenheit by providing coolers, special roofs and regular hose-downs.