void Date::Set(int scalar)
Assign a date that is stored in the numeric scalar.

void Time::Set(int64 scalar)
Assign a time that is stored in the numeric scalar.

int64 unixtime = ..........
Time timestamp;
time.Set(unixtime);
time.year+=1970;

#include <Core/Core.h>
#include <time.h>

using namespace Upp;

CONSOLE_APP_MAIN
{
	time_t scalar = time(0); // seconds since 1/1/1970 00:00:00
	Time back;
	back.Set(scalar);
		
	Cout() << "The time is: " << asctime(localtime(&scalar)) << "\n"; // oldskool functions
	Cout() << "Scalar = " << scalar << "\n";
	Cout() << "Converted back = " << back << "\n";
}

Time t = FileTime(timestamp);

const Time epoch(1970,1,1);
Time t;
t.Set(epoch.Get()+timestamp);