A Google Calendar can be useful for teacher librarians to schedule class times in the library. Creating a calendar in Google involves filling out important information like event dates, times, and sharing the calendar with other teachers and staff by including their emails. Repeating events like recurring class periods can be easily added to the calendar by selecting the weekly option and entering an end date for the meetings. The calendar can be customized by color-coding different calendars or viewing it by the week or day.