1. Log into your Google Calendar account.
2. Under Other Calendars in the bottom-left, click on the vertical ellipses next to the O'Dowd Events Calendar, then click on Settings. (If the list is not expanded, click on the arrow next to Other Calendars.)
3. Scroll to the very bottom of the Settings page and click on the Unsubscribe button.
4. You should be unsubscribed from the O'Dowd Events Calendar and should not receive any more email notifications regarding it.