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MCP Timezone Planner in Claude Code

Find meeting slots inside everyone's working hours. It converts times between IANA zones with DST read from the ICU data in your Node build, ranks meeting slots where every participant is inside their own working hours, computes the daily overlap and clock changes, and writes .ics files.

Scheduling from the terminal without leaving it is the point, and the server makes no network call at all, so it behaves the same on a locked-down machine as on your own. The only file it writes is the .ics you asked for.

What you get in Claude Code

You say	Tool
Find an hour next week for me in Warsaw, my client in New York and my designer in London.	`find_meeting_slots`
When are Warsaw and New York both at work?	`overlap`
Write me the .ics for Thursday 3pm Warsaw, 45 minutes.	`ics_create`

Warsaw and New York on 09:00 to 17:00 days share 2 hours on 2026-09-10 and 3 hours on 2026-03-16, because the United States moves to daylight time on 8 March and Europe on 29 March. The overlap is computed on a real date, so it says so.

Install it in Claude Code

The file is .mcp.json, and the key inside it is mcpServers.

Scope	Path
local (default)	`~/.claude.json, this project only`
project	`.mcp.json at the repository root`
user	`~/.claude.json, every project`

If you also run Claude Desktop, the shortest path there is one click: timezone.mcpb from the bundle catalog opens as an extension, with no JSON and no terminal. Claude Code reads its own config, so here it is:

From the terminal, against a built file:

claude mcp add --scope user timezone -- node /absolute/path/to/mcp-servers/servers/timezone/dist/index.js
claude mcp list    # health-check it before the first prompt

# or --scope project, committed to .mcp.json for the team

The node command above wants a built file. From a clone, once:

git clone https://github.com/theluckystrike/mcp-servers.git
cd mcp-servers && npm install
npm run build -w packages/mcp-license -w servers/timezone

That writes servers/timezone/dist/index.js, and its absolute path is the one argument the config needs.

The npm packages are not published yet, so the form below returns a 404 today. It is here because it is what the entry becomes the day the publish lands, with nothing else changed:

claude mcp add timezone -- npx -y @theluckystrike/mcp-timezone

No restart. The entry is picked up in the next session, and `/mcp` reconnects one on demand.

Nothing is published to npm yet, so the working install paths are the ones above: the .mcpb bundle from the bundle catalog, a clone and build, or the hosted URL.

No install: the hosted endpoint

The same server runs at https://mcp.zovo.one/mcp/timezone over MCP streamable HTTP, no install. Mint a free token with curl https://mcp.zovo.one/mcp/token, or use a Pro key. It has no filesystem, so a file comes back as a one-hour download link.

claude mcp add --transport http timezone https://mcp.zovo.one/mcp/timezone \
  --header "Authorization: Bearer <token>"

Claude Code notes worth knowing first

The `--` is load-bearing: it separates Claude Code's own options, such as --transport, --env and --scope, from the command that runs the server. And the default scope is local, private to you and to the directory you ran it in, so adding it in the wrong folder leaves the tools absent with no error at all.

Free: conversions, overlap, DST and business days unlimited; slots for 3 participants over 5 days, 5 contacts, 3 ics a month. Pro is $19 once, verified offline.

Questions

Which scope should I use for MCP Timezone Planner?

Local, the default, writes ~/.claude.json and is private to you and that directory. --scope project writes .mcp.json at the repository root, shared through version control. --scope user loads it everywhere.

Why did my first prompt ignore the server?

Measured, not documented: of three fresh projects, one first prompt made zero tool calls although initialize answered in 1.05 seconds. Run claude mcp list once first: it prints Connected, and the next run used the tool.

Can I use MCP Timezone Planner without installing anything?

Yes: claude mcp add --transport http timezone https://mcp.zovo.one/mcp/timezone --header "Authorization: Bearer <token>". Mint a free token at https://mcp.zovo.one/mcp/token or use a Pro key. -t and -H are the short forms.

MCP Timezone Planner in detail · The same server in Claude Desktop and Cursor · Every server in Claude Code · Guides · Claude Code docs · Buy Pro

Related guides & tools

Find a meeting time across time zones without doing the arithmetic · Read a .ics calendar in Claude: free and busy, conflicts, and billable meetings