Japan & World Public Holidays

Reliability

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How to connect

Add it to any MCP client that supports remote servers.

{
  "mcpServers": {
    "japan-public-holidays": {
      "type": "http",
      "url": "https://holiday.omikuji.dev/mcp"
    }
  }
}

4 tools

• check_dates

  For each date, tell whether it is a Japanese national holiday (with name and kind: 祝日 / 振替休日 / 国民の休日), a weekend, and a business day. Also returns today in Japan time.

• list_holidays

  List Japanese national holidays for a year, or between from and to. With no arguments, lists the next 10 holidays from today (Japan time).

• 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). Business day = weekday that is not a national holiday. Set year_end_closed to also skip 12/29-1/3.

• find_long_weekends

  Find 連休 (3+ consecutive days off made of weekends and national holidays), e.g. Golden Week, Silver Week. Give a year, or from (default today) to list upcoming ones.

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