Esperanto Day, also called Zamenhof Day, is celebrated on December 15, 2021. The 15th December is the birthday of Esperanto creator L. L. Zamenhof. It is the most widely celebrated day in Esperanto culture. Esperanto is the most widely spoken constructed international auxiliary language.
We have placed a detailed description of this event on this page: Esperanto Day 2020. For further information please stop by there!