I have some arbitrary epoch, like July 13, 1988. Essentially I want to measure the time relative to this. I was thinking of writing a custom clock class, so that I could write code like this:

using std::chrono;
time_point<My_Clock> tp;
std::cout << duration_cast<seconds>(tp.time_since_epoch()).count() << std::endl;

Is this possible? If not, what's the cleanest way to accomplish this?

c++ c++11 c++-chrono
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