Add the TWHS Orchestra Calendar to your own calendar: 
Public URL: 
https://calendar.google.com/calendar/embed?src=worthington-portal.org_vqhcneqcdp59mpk8kkmu9l6nug%40group.calendar.google.com&ctz=America%2FNew_York

Public iCal address: 
​https://calendar.google.com/calendar/ical/worthington-portal.org_vqhcneqcdp59mpk8kkmu9l6nug%40group.calendar.google.com/public/basic.ics