The Day of Knowledge is celebrated in Russia on September 1. It marks the start of the academic year for schoolchildren and college students. Children across the globe started going back to class despite the ongoing coronavirus pandemic. The number of confirmed novel coronavirus cases across the globe exceeded 25 mln on August 30, according to the US-based Johns Hopkins University, which relies on data provided by international organizations, federal and local authorities. First day back to school in different parts of the world - in this photo gallery.