A lot of people make festivals in which they: dance, eat, face paint, sell items and much more on that day people make their ancestors their favorite foods and leave it on there altar so that they can make them happy. Many people say that on that specific day they can feel them with them. This is just a bit of info there is a lot more.
The translation is: I am going to a concert tonight. What time? (or what i think it is) for this answer just put down a time like: a las ocho de la noche hope this helped! (: