CalMerger/calendar/Date based events.json

{
  "id": "Date based events",
  "linkGroupName": "Date based events",
  "calendars": [
    {
      "prefix": "Us holidays",
      "override": false,
      "url": "https://www.calendarlabs.com/ical-calendar/ics/76/US_Holidays.ics"
    }
  ]
}