{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://github.com/invopop/jsonschema/compact-date",
  "$ref": "#/$defs/CompactDate",
  "$defs": {
    "CompactDate": {
      "type": "string",
      "pattern": "^[0-9]{4}-[0-1][0-9]$",
      "title": "Compact Date",
      "description": "Short date that only includes year and month"
    }
  }
}