I published my spreadsheet to my Google drive. I made the file public. It's a Google Sheets document. For my presentation, I go to add the new schedule in the Google Schedule widget. Then I tell the widget to show the properties. In the properties, I tell the widget to show a range of cells. When I click SAVE, SAVE, SAVE - the range of cells will not show. I've also formatted the times in the cells to the Google formats.