Zamenhof Day
Zamenhof Day Esperanto: Zamenhofa Tago, Polish: , also called Esperanto Book Day, is celebrated on 15 December, the birthday of Esperanto creator L. L. Zamenhof. this is the the nearly widely celebrated day in Esperanto culture. On this day, Esperantists hold believe information sessions in addition to 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 delivered to his friends his ]
Zamenhof's 150th birth anniversary
15 December 2009 marked 150 years since Zamenhof's birth, and there were several events to celebrate. On this date, the authorities in his home town of Białystok, Poland, opened a new Zamenhof Center, and a symposium honoring Zamenhof was held in New York City, featuring talks by Arika Okrent and Humphrey Tonkin among other professors.
Also on this date, the search engine Google, in 33 national language versions but non the international English one, bore a special report 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".