Zamenhof Day Zamenhof Day Zamenhof Day (), also called Esperanto Book Day, is celebrated on 15 December, the birthday of Esperanto creator L. L. Zamenhof. It is the most widely celebrated day in Esperanto culture. On this day, Esperantists hold information sessions and cultural gatherings to promote literature in Esperanto. The history of celebrating Esperanto on Zamenhof's birthday can be traced back to 17 December 1878, when at a birthday party for his 19th birthday he presented to his friends his "Lingwe uniwersala", the first version of his international language. By 1887, this language had evolved into what is now recognized as
Ludwik Idzikowski Ludwik Idzikowski Ludwik Idzikowski (August 24, 1891 – July 13, 1929) was a Polish military aviator. He died during a transatlantic flight trial. Ludwik Idzikowski was born in Warsaw. He started mining studies in Liege, Belgium. At the outbreak of World War I, he was conscripted into the Russian Army. He completed aviation school in Sevastopol, and from 1916 served in air combat units as an officer pilot. After the October Revolution he managed to return to Warsaw and in November 1918 Idzikowski joined the newly-born Polish Army, in the rank of "podporucznik pilot" (flying 2nd Lieutenant). In 1919 he