On Sunday the choir will be one of twelve choirs performing during the 3rd Choral Marathon commemorating World Environment Day.
If you're local, it will be from 11:00 am - 5:00 pm at the "Alfonso Esparza Oteo" House at the SACM, near Metro Coyoacan. And it's free!
**Update: Looks like it will also be transmitted live via Online Radio at http://www.e-radio.edu.mx/html/webradio or, if you're local, on 1060 am. We'll be singing at 12:30 pm (local time).