World Happy First Day of Summer June 20, 2012 prev3 of 9next Michael Loccisano / Getty ImagesSinger Patrick Monahan of Train performs during the 15th Annual WPLJ Summer Blast-Off at Jenkinsons On The Boardwalk on May 25, 2012 in Point Pleasant Beach, New Jersey. Share Read Later TIME takes a look at how people across the Northern Hemisphere are getting ready to greet the long, hot days ahead.