lst-0049-book.cpp
// https://godbolt.org/z/Md38b9zvf
#include <chrono>
#include <iostream>
#include <format>
using namespace std::chrono;
int main() {
auto ymd = last/February/2024; // last day in February 2024: 2024-02-29
std::cout << ymd << "\n"; // the output with << is simple
std::cout << std::format("{:%Y-%m-%d}\n", ymd); // format is more flexible
std::cout << std::format("{:%e. %B %y}\n", ymd); // much more flexible!
}