# Days Between New Years

Calculate the number of days till new years

      /* Provides a simple example of using a date_generator, and simple
       * mathematical operatorations, to calculate the days since
       * New Years day of this year, and days until next New Years day.
       *
       * Expected results:
       * Adding together both durations will produce 366 (365 in a leap year).
       */
      #include <iostream>
      #include "boost/date_time/gregorian/gregorian.hpp"

      int
      main()
      {

        using namespace boost::gregorian;

        date today = day_clock::local_day();
        partial_date new_years_day(1,Jan);
        //Subtract two dates to get a duration
        days days_since_year_start = today - new_years_day.get_date(today.year());
        std::cout << "Days since Jan 1: " << days_since_year_start.days()
                  << std::endl;

        days days_until_year_start = new_years_day.get_date(today.year()+1) - today;
        std::cout << "Days until next Jan 1: " << days_until_year_start.days()
                  << std::endl;
        return 0;
      };