#include "date.h"
#include <iostream>

int
main()
{
    using namespace date;
    using namespace std::chrono_literals;
    auto ymd = apr/29/2016;
    std::cout << ymd << '\n';
    std::cout << day_point{ymd} + 260'000s << '\n';
}

Output:

2016-04-29
2016-05-02 00:13:20