// This example displays the amount of time until new year's in days #include "boost/date_time/gregorian/gregorian.hpp" #include <iostream> int main() { 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; };