Answer:
On the 30th of December which equates to 0.065 billion years ago
Explanation:
The cosmic calendar was made popular by a famous astronomer named Carl Sagan. His aim was to help people to better understand when a particular prehistoric event in the universe occurred when compared to another prehistoric event. 
He achieved the aim by chronologically arranging the 13.8 billion years of the universe age into one year. According to such arrangement, the Big Bang occurred on the 1st of January (13.8 billion years ago) while Dinosaurs went into extinction on the  30th of December (0.065 billion years ago). 
Following their extinction, the age of primates began on the 31st of December (Just 40 million years ago). You can see that Carl Sagan's visualization puts the beginning of primates (which men evolved from) immediately after the extinction of Dinosaurs and very far away from the Big Bang that signifies the creation of the universe.
 
        
             
        
        
        
Answer: The Battle for Lake Tanganyika was a series of naval engagements that took place between elements of the Royal Navy, Force Publique and the Kaiserliche Marine between December 1915 and July 1916, during the First World War. The intention was to secure control of the strategically important Lake Tanganyika, which had been dominated by German naval units since the beginning of the war. The British forces — consisting of two motor boats named HMS Mimi and Toutou — were under the command of the eccentric Lieutenant-Commander Geoffrey Spicer-Simson. The boats were transported to South Africa and from there by railway, by river, and by being dragged through the African jungle, to the lake.
Explanation:
 
        
             
        
        
        
Read this , I don’t know how to explain it though sorry:/