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World Public Holidays

by omikuji.devversion 1.2.0i★ –iRuns in the cloud
Registry namedev.omikuji/holiday

Install

Overview

Description from the maker (original English)

Public holidays, business days and long weekends for about 250 countries, in each local time zone.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

  • Connection: Runs in the cloud
  • Transport: Streamable HTTP
  • Category: Travel, maps & weather

Install

Pick the AI app you use, then copy the settings.

Before you install

You need

Which app do you use?

Pick your app above. We remember it, so next time the button says “Install in …”.

Works in Claude on the web, desktop and mobile:

  1. Open Settings → Connectors
  2. Press Add custom connector
  3. Paste the address below and press Add
  4. If it asks you to sign in, sign in with the maker
SettingsConnectors1+ Add2https://…3
https://holiday.omikuji.dev/mcp

Run this in your terminal

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

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

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

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "holiday": {
      "type": "http",
      "url": "https://holiday.omikuji.dev/mcp"
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

ChatGPT connects only to servers on the internet:

  1. Open ChatGPT on the web → Settings → Connectors (Apps)
  2. Press Create or Add (some plans need Developer mode under Advanced first)
  3. Paste the address below, give it a name and save
  4. If it asks you to sign in, sign in with the maker
SettingsConnectors1+ Create2https://…3
https://holiday.omikuji.dev/mcp

Menu names can differ slightly by plan and over time.

Your choice stays on this device in a cookie; no account needed.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Tool names and descriptions exactly as the server reported them on Nov 7, 2026. The maker wrote them, not us; we show them as plain text.

  • 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)

  • list_holidays

    List a country's public holidays for a year, or between from and to (and make-up working days, if any). With no year or range, lists the next 10 holidays from today in that country.

  • 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

  • find_long_weekends

    Find long weekends: 3+ consecutive days off made of weekends and public holidays in the country (e.g. Japan's Golden Week, China's National Day Golden Week). Give a year, or from (default today) to list upcoming ones.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 7, 2026

  • ! Caution

    Maker matches the repo

    The registry lists no source repo, so we cannot match the publisher (omikuji.dev) to the code

  • … Not checked yet

    Still maintained

    We have not read this repo from GitHub yet

  • … Not checked yet

    Has a licence

    We have not read this repo from GitHub yet

  • ✓ Pass

    Endpoint responds

    Responded in 134 ms (HTTP 200)

  • – Not applicable

    Sign-in with OAuth

    No sign-in needed

  • ✓ Pass

    No hidden instructions in tool descriptions

    Read 4 tool descriptions and found no hidden instructions to the AI

Compared with others in Travel, maps & weatheri

  • More stars than 0% of the other 1706 servers in this category
  • Published to the registry more recently than 79% of the other 1706 servers in this category
  • Basic checks equal to or better than 50% of the other 1706 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is World Public Holidays safe?

It passed 2 of 3 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs in the maker’s cloud. Connect over the internet with nothing to install, but what you send passes through the maker’s servers.

Is it still maintained?

The GitHub repo last changed –, and the latest version (1.2.0) reached the registry 8 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.

What can I use instead?

In the same category: CGC Airport Transfers, Flightaware MCP, Killbottleneck

Alternatives

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Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

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Live flight tracking and aviation data via FlightAware AeroAPI (flights, airports, alerts).

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Killbottleneck

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Free-to-self-host goal and process maps for humans and AI agents, with REST API and MCP.

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README from the maker

No README found in the repo

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