{
  "0": "blank_calendar",
  "1": "date_difference",
  "2": "holiday_calendar",
  "3": "iso_week",
  "4": "julian_calendar",
  "5": "leap_year",
  "6": "monthly_calendar",
  "7": "print_layout",
  "8": "weekday_lookup",
  "9": "yearly_calendar"
}