The following code example is taken from the book
The C++ Standard Library - A Tutorial and Reference, 2nd Edition
by Nicolai M. Josuttis, Addison Wesley Longman, 2012
Copyright © 2012 by Pearson Education, Inc. and Nicolai M. Josuttis
#include <locale>
#include <chrono>
#include <ctime>
#include <iostream>
#include <exception>
#include <cstdlib>
using namespace std;
int main ()
{
try {
// query local time:
auto now = chrono::system_clock::now();
std::time_t t = chrono::system_clock::to_time_t(now);
tm* nowTM = std::localtime(&t);
// print local time with the global classic locale:
locale locC;
const time_put<char>& tpC = use_facet<time_put<char>>(locC);
// use single conversion specifier
tpC.put (cout, cout, ' ', nowTM, 'x');
cout << endl;
// use format string:
string format = "%A %x %I%p\n"; // format: weekday date hour
tpC.put (cout, cout, ' ', nowTM,
format.c_str(), format.c_str()+format.size() );
// print local time with German locale:
#ifdef _MSC_VER
locale locG("deu_deu.1252");
#else
locale locG("de_DE");
#endif
const time_put<char>& tpG = use_facet<time_put<char>>(locG);
tpG.put (cout, cout, ' ', nowTM, 'x');
cout << endl;
tpG.put (cout, cout, ' ', nowTM,
format.c_str(), format.c_str()+format.size() );
}
catch (const std::exception& e) {
cerr << "Exception: " << e.what() << endl;
return EXIT_FAILURE;
}
}