CalMerger/calendar/Override_Calendar.json

{
  "id": "Override_Calendar",
  "linkGroupName": "Override Calendar",
  "calendars": [
    {
      "url": "https://www.calendarlabs.com/ical-calendar/ics/65/San_Francisco_Public_Holidays.ics",
      "prefix": "Override Event",
      "override": true
    }
  ]
}