how to get real date (not system date) by c# or c++?

Question

Is it possible to get real date (not system date) without any connection to internet? I developed my application by C#. DateTime.Now gets system date but I want to know real

Answer 1

If the system date is wrong, then your application has to get the correct date from somewhere else. That means and outside resource. It can be over the web, it could be another server in your network, or you could enter it manually. There are no magical solutions.