Dynamically changing(loading) images on daily schedule

Assuming that you'll get the images from web, that might help. examples/imageLoaderWebExample could be what you are looking for. You can get the time of the day like this:

std::string getCurrentTime(const std::string &splitter/)
{
    time_t now = time(0);
    std::tm tstruct;

    memset(&tstruct, 0, sizeof(tstruct));

    char buf[80];
    tstruct = *localtime(&now);
    std::string format = "%H" + splitter + "%M";
    strftime(buf, sizeof(buf), format.c_str(), &tstruct);

    return buf;
}

Or like this:

std::string getCurrentTime()
{
    auto now = std::chrono::system_clock::now();
    auto inTime = std::chrono::system_clock::to_time_t(now);

    std::stringstream ss;
    ss << std::put_time(std::localtime(&inTime), "%Y-%m-%d %X");
    return ss.str();
}

And based on that time you would update your ofImage.
Is that what you asked for?