August Monday is the day that celebrates Emancipation Day in some countries. This holiday is the first Monday in August and is the start to a week long summer festival, Carnival, in many caribbean countries.
Many states, territories and countries observe on various days with different names: August Monday, August Festival, Culturama, or has related holidays such as Juneteenth or J'ouvert, the celebration is always to commemorate the abolishment of slavery and freedom.