So, you have the option of picking either Palm Sunday (yes, I know Palm Sunday is not part of Holy Week, but let’s just consider that it is), Holy Thursday, Good Friday, Easter Vigil, or Easter Sunday.
I would have to say that Holy Thursday is my favorite. There is just something about that Mass that you can just feel a tragedy is about to happen. It’s so beautiful too, especially hearing the bells ringing during the Gloria and then remaining silent until the Easter Vigil. Easter Sunday is probably my second favorite. I love hearing the Easter hymn bells play a half an hour before Mass begins, and it just feels like salvation has been won, which obviously, it has.