Zamenhof Day (but not the international English one), bore a special version of their logo (a Doodle) emblazoned with the Esperanto flag in honor of the occasion, which generated, on the 30 biggest Wikipedia languages, 1,750,000 page views on the articles "L. L. Zamenhof". 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
Orgelbrand's Universal Encyclopedia (1859) the first edition of the years (1872-1876, 1877-1879, 1883-1884, 1898-1904) had a volume-reduced form. In 1984-1985, a reprint of the original version was published in Poland. The creators of the publication's content were many representatives of the Polish nineteenth-century intelligentsia. In entry to the first volume published in 1859, a list of authors of the encyclopedia has been published. It contained the following names: Adam Adamowicz, Jerzy Alexandrowicz, Władysław Ludwik Anczyc, Michał Baliński, Jan Baranowski, Sadok Barącz, Adam Bartoszewicz, Julian Bartoszewicz, Władysław Bentkowski, Feliks Berdau, Leopold Berkiewicz, Cezary Biernacki, Julian Bleszyński, Kazimierz Bujnicki, Ignacy Chodźko, Teofil Cichocki, Wojciech Cybulski, Wincenty