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Japan & World Public Holidays

dev.omikuji/holiday · v1.1.0

Measured by MCP Station

Description written by the publisher, not verified

Public holidays, business days and long weekends for Japan (Cabinet Office) and 245 other countries.

Connect

claude mcp add --transport http holiday https://holiday.omikuji.dev/mcp

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

Tools as reported by the server

• 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. With country, the same for that country (holiday names, status, make-up workdays such as China's 调休).
• 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). With country, lists that country's public holidays (and make-up workdays, if any).
• 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. With country, uses that count
• 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. With country, the same for that country.

Website · JSON · Text for agents · Registry updated 2026-10-15