Boost DateTime

http://www.boost.org/doc/libs/1_57_0/doc/html/date_time/gregorian.html#date_time.gregorian.date_class

boost::gregorian::date d(2015, 1, 30); 

LOG_DEBUG<<boost::gregorian::to_iso_extended_string(d); //2015-01-30

// 가감연산

boost::gregorian::days dd(1); //1일

boost::gregorian::years dy(1); //1년

boost::gregorian::months dm(1); //한달

boost::gregorian::date d2 = d+dd+dy+dm; // 2015-01-30 + 1년1달1일

LOG_DEBUG<<boost::gregorian::to_iso_extended_string(d2); //2016-02-29

// 날짜차이

boost::gregorian::date_period dp1(d,d2);

LOG_DEBUG<<"날짜차이="<<dp1.length(); //395

// 변환

time_t tNow = time(NULL);

tm* tm_now = localtime(&tNow);

boost::gregorian::date d3 = boost::gregorian::date_from_tm(*tm_now);

tm d_tm = boost::gregorian::to_tm(d3);

LOG_DEBUG<<boost::gregorian::to_iso_extended_string(d3);