April 23 is St. George's Day, that is celebrated in various Christian churches and countries, where Saint George is considered as the patron saint. The date when St. George had died in 303 AD became the traditional day for celebration of the feast day.
In the United Nations, each official language has its own commemorative day. English Language Day is celebrated on April 23, the date traditionally observed as William Shakespeare's birthday.
International Pixel-Stained Technopeasant Day is an annual commemoration held on April 23. On this day, professional writers are encouraged to post their works for free on the Internet.
World Book and Copyright Day is a United Nations observance annually held on April 23. It is organized by UNESCO in order to promote reading culture, book publishing, and copyright. The first celebration took place on April 23, 1995.