In Spanish, the 3rd person (singular and plural) of the present subjunctive is used to form the formal mandates.
In informal mandates, the 3rd person singular of the present indicative is used to form the affirmative mandates and the 2nd person (you) of the present subjunctive to form the negative mandates.
mi dia de celebracion es el 20 de julio. en colombia se celebra ese dia porque es el dia de laindependencia. todas las personas se ponen la camiseta de la seleccion y hacen muchas fiestas.