A sane way to format dates from boost. Simple interface, no noodling with stringstreams and locales.

DateUtils.cpp

//
//  DateUtils.cpp
//  Created by David Wicks on 4/23/11.

#include "DateUtils.h"
#include <sstream>

using namespace boost::gregorian;
using namespace std;

string DateUtils::formatDate( const date& d, const string& fmt )
{
    date_facet* facet( new date_facet() );
    facet->format( fmt.c_str() );
    stringstream ss;
    ss.imbue( locale( locale::classic(), facet ) );
    ss << d;
    
    return ss.str();
}

DateUtils.h

//
//  DateUtils.h
//  Created by David Wicks on 4/23/11.
//


#pragma once

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

struct DateUtils
{
    static std::string formatDate( const boost::gregorian::date& d, const std::string& fmt );
};