For the default sorting functionality in magento product display it doesn't show the newest product first in listing. But the true thing is people(webmaster/business owner) always want to show their newest product first in listing. If we are using Magento 1.7.2 or above it will support position in category of product but it doesn't help since we have to set position all of time. That 's why we show you this article to solve magento sort by newest products