Exiv2

        try {

            SXMPUtils::ConvertToDate(value, &datetime);

        }

        catch (const XMP_Error& e) {

#ifndef SUPPRESS_WARNINGS

            std::cerr << "Warning: Failed to convert " << from << " to " << to << " (" << e.GetErrMsg() << ")\n";

#endif

            return;

        }