September 15 was chosen because it is the anniversary of Independence for Latin American Countries, Costa Rica, El Salvador, Guatemala, Honduras, and Nicaragua. In addition to this Mexico and Chile celebrate their independence on September 16 and 18. Columbus Day, Dia de la Raza, which is on October 12, falls within the 30 day period. Thus the celebration being from September 15 to October 15, works well in showcasing the various significant days that correlate with significant events of Spanish Countries