World Public Holidays

{
  "mcpServers": {
    "dev.omikuji/holiday": {
      "url": "https://holiday.omikuji.dev/mcp"
    }
  }
}

Indexed tools

Tool metadata and schemas come from the remote server and are untrusted. Indexing only lists tools; it never calls them.

4 shown · authentication unknown

• Business days

  business_days

  Count business days between start and end (inclusive), or find the date that is N business days after start (add=N; negative N goes backward; start itself is not counted). Uses the country's weekend days, public holidays and make-up working days. For Japan, set year_end_closed to also skip 12/29-1/3.

  Schema valid · SHA-256 adcb4137e5ba…

  View input schema

  {
    "type": "object",
    "properties": {
      "start": {
        "type": "string",
        "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
        "description": "YYYY-MM-DD"
      },
      "end": {
        "type": "string",
        "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
        "description": "Count up to this date (inclusive)."
      },
      "add": {
        "type": "integer",
        "minimum": -2000,
        "maximum": 2000,
        "description": "Move this many business days from start."
      },
      "year_end_closed": {
        "type": "boolean",
        "default": false,
        "description": "Japan only."
      },
      "country": {
        "type": "string",
        "pattern": "^[A-Za-z]{2}$",
        "default": "JP",
        "description": "ISO 3166-1 alpha-2 country code (e.g. US, GB, DE, CN, JP). Defaults to JP (Japan) when omitted."
      },
      "region": {
        "type": "string",
        "description": "Outside Japan: state/province code (ISO 3166-2 suffix, e.g. CA for California) to include regional holidays."
      },
      "include_government": {
        "type": "boolean",
        "default": false,
        "description": "Outside Japan: also treat days off only for government offices (e.g. Indonesia's cuti bersama, Canadian federal holidays) as days off."
      }
    },
    "required": [
      "start"
    ],
    "additionalProperties": false
  }

• Check dates

  check_dates

  For each date, tell whether it is a public holiday in the country (with its name and status), a weekend, and a business day, including make-up working days such as China's 调休. Also returns today in that country's time zone. For Japan, the kind is also given: 祝日 (national holiday) / 振替休日 (substitute holiday) / 国民の休日 (citizens' holiday).