Subscribe to an iCalendar feed in Google Calendar, and solve update issues

Photo of smartphone resting on appointment book
Photo by Jan Vašek

My work recently moved to a new online shift scheduling and calendar system. The work calendar can generate a URL linking to an .ics file — an iCalendar feed — making it possible to subscribe to my work schedule with calendar services such as Microsoft Outlook, Apple Calendar, and Google. Subscribed with Google Calendar, new work shifts appear in the calendar on…