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Calculate the number of days till new years

// This example displays the amount of time until new year's in days

#include "boost/date_time/gregorian/gregorian.hpp"
#include <iostream>

  using namespace boost::gregorian;

  date::ymd_type today = day_clock::local_day_ymd();
  date new_years_day(today.year + 1,1,1);
  date_duration dd = new_years_day - date(today);
  std::cout << "Days till new year: " << dd.days() << std::endl;
  return 0;

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