Checkiday Event Detail

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://api-evangelist.github.io/checkiday-national-holiday-api/json-schema/checkiday-event-detail-schema.json",
  "title": "Checkiday Event Detail",
  "description": "A detailed holiday or observance including descriptions, founders, observance patterns, and occurrences.",
  "type": "object",
  "required": ["id", "name", "url", "adult", "alternate_names"],
  "properties": {
    "id": { "type": "string" },
    "name": { "type": "string" },
    "url": { "type": "string", "format": "uri" },
    "adult": {
      "type": "boolean",
      "description": "Whether this Event is unsafe for children or viewing at work."
    },
    "alternate_names": {
      "type": "array",
      "items": {
        "type": "object",
        "required": ["name"],
        "properties": {
          "name": { "type": "string" },
          "first_year": { "type": ["integer", "null"] },
          "last_year": { "type": ["integer", "null"] }
        }
      }
    },
    "hashtags": {
      "type": "array",
      "items": { "type": "string" }
    },
    "image": {
      "type": "object",
      "required": ["small", "medium", "large"],
      "properties": {
        "small": { "type": "string", "format": "uri" },
        "medium": { "type": "string", "format": "uri" },
        "large": { "type": "string", "format": "uri" }
      }
    },
    "sources": {
      "type": "array",
      "items": { "type": "string", "format": "uri" }
    },
    "description": {
      "$ref": "#/$defs/RichText"
    },
    "how_to_observe": {
      "$ref": "#/$defs/RichText"
    },
    "patterns": {
      "type": "array",
      "items": {
        "type": "object",
        "required": ["observed", "observed_html", "observed_markdown", "length"],
        "properties": {
          "first_year": { "type": ["integer", "null"] },
          "last_year": { "type": ["integer", "null"] },
          "observed": { "type": "string" },
          "observed_html": { "type": "string" },
          "observed_markdown": { "type": "string" },
          "length": { "type": "integer", "minimum": 1 }
        }
      }
    },
    "occurrences": {
      "type": "array",
      "items": {
        "type": "object",
        "required": ["date", "length"],
        "properties": {
          "date": { "type": "string" },
          "length": { "type": "integer", "minimum": 1 }
        }
      }
    },
    "founders": {
      "type": "array",
      "items": {
        "type": "object",
        "required": ["name"],
        "properties": {
          "name": { "type": "string" },
          "url": { "type": "string", "format": "uri" },
          "date": { "type": "string" }
        }
      }
    },
    "tags": {
      "type": "array",
      "items": {
        "type": "object",
        "required": ["name"],
        "properties": {
          "name": { "type": "string" }
        }
      }
    }
  },
  "$defs": {
    "RichText": {
      "type": "object",
      "description": "Text formatted as plain text, HTML, and Markdown.",
      "properties": {
        "text": { "type": "string" },
        "html": { "type": "string" },
        "markdown": { "type": "string" }
      }
    }
  }
}