Simplify the following text for a Grade 11 native English-speaking person.
Original: With the agreement signed between the Provincial Government of LeÃ n and the AsociaciÃ n Cultural de la Llingua LlÃ onesa El Fueyu was born the Leonese Language Day on June 20 , 2006 .
Simplified: With the agreement signed between the Provincial Government of LeÃ n and the AsociaciÃ n Cultural de la Llingua LlÃ onesa El Fueyu born the Leonese Language Day on June 20th , 2006 .