From many calendar apps, you can add SF Choral’s schedule to your calendar by “subscribing” to get all scheduled events and future changes automatically placed in your own calendar.
If you already use Google calendar, it’s easy to add events from the SF Choral calendar. See the explanation here.
If you use other apps, you’ll need to copy and paste in this address: https://www.google.com/calendar/ical/sfchoralsociety%40gmail.com/public/basic.ics
If you use iOS Calendar on an iPhone or iPad, there’s a step-by-step explanation here. (Note the explanation at the bottom of the page about adding multiple Google calendars to your iOS calendar.)
If you use Microsoft Outlook, there’s more information here. Enter the above link at Step 8.