Christian Science Monitor: For most of the world’s 1.5 billion Muslims, the fast will begin Wednesday at dawn (though some will delay a day if the new moon isn’t sighted by a religious authority they follow). With the Islamic lunar calendar cycling through the solar Gregorian calender that the West uses roughly every 30 years, Ramadan now – and for the next five or so years – will correspond with the hottest and longest days of summer for most Muslims. And, at least from a short-run perspective, those hottest …