Evening: Back in Berlin Bethmann gets the news of the Russian partial mobilisation and meets with Jagow, Moltke and Falkenhayn to decide what to do. Moltke and Bethmann are still against German mobilisation and even the proclamation of “State of Imminent Danger of War”.
Russian partial mobilisation does not necessarily mean war. Nevertheless, they dispatch the ultimatum to Belgium to the German embassy in Brussels so it is available if needed.