From Time Point to Calendar Time

Thanks to std::chrono::system_clock::to_time_t, you can convert a time point that internally uses std::chrono::system_clock to an object of type std::time_t. Further conversion of the std::time_t object with the function std::gmtime gives you the calendar time, expressed in Coordinated Universal Time (UTC). In the end, this calendar time can be used as the input for the function std::asctime to get a textual representation of the calendar time.