Timezone Mcp

io.github.MukundaKattaPublished by GitHub account MukundaKattav0.1.0Updated Oct 27, 2026

IANA timezone conversions with real DST rules.

The publisher's own server: timezone.football

VerifiedSTDIODesktop onlyDeveloper Tools

Overview

AI-generated overview

Local MCP server that converts UTC instants to IANA timezones with real DST rules, so an assistant stops guessing offsets.

What you can do
  • Convert a UTC ISO instant into local time in a named IANA timezone
  • Get the current local time in a given timezone
  • Look up the UTC offset at a specific instant, DST-aware
  • Offsets come from the runtime's built-in Intl.DateTimeFormat, so no tzdata package or native binary is needed
When to use it
Useful when an assistant has to answer timezone questions where DST transitions, half-hour offsets or seasonal offset changes matter, and you want the answer computed from IANA rules instead of recalled from memory.
Requirements
Runs as a local stdio process on the user's machine, launched for example with npx from the npm package @mukundakatta/timezone-mcp. Needs Node.js, whose bundled IANA database supplies the rules. No accounts, API keys, environment variables or headers are declared.
Before you install
Read-only conversion and lookup tools; no data is written or sent to third parties. Correctness depends on the Node.js version's bundled timezone database, so very recent rule changes may lag until Node is updated. Desktop-only configuration.

Installation

In SourceWeft

  1. Open Timezone Mcp in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Desktop only via STDIO. STDIO servers start a local process, so they need the SourceWeft desktop host.

Other MCP clients

Follow the launch instructions in the repository.

README

@mukundakatta/timezone-mcp

MCP server for IANA timezone conversions. Real DST rules, real offsets via the built-in Intl.DateTimeFormat. No tzdata dependency, no native binary — Node ships the IANA database.

Tools

  • convert_tz(instant, timezone) — UTC ISO → local in target tz
  • now_in(timezone) — current local time in target tz
  • tz_offset(instant, timezone) — UTC offset at that exact instant (DST-aware)

Why this exists

LLMs hallucinate timezone offsets and DST transition dates. They will confidently say "PST is UTC-8" in summer (it's PDT, UTC-7). They get India's +5:30 half-hour offset wrong. Routing through Intl.DateTimeFormat returns whatever the actual IANA rules say.

Install — Claude Desktop

json
{  "mcpServers": {    "timezone": { "command": "npx", "args": ["-y", "@mukundakatta/timezone-mcp"] }  }}

Same shape for Cursor / Cline / Windsurf / Zed.

License

MIT OR Apache-2.0.

Source: packages/timezone-mcp/README.md at commit 6fad5bb

Tools

0
SourceWeft has not started this package in its sandbox yet, so its tools are not known.

Version history

1
  1. v0.1.0LatestSep 16, 2026

Score

50% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 days25 pts

    Keep the endpoint answering the MCP handshake; SourceWeft probes it every 30 days.

  • Auth declared10 pts

    Declare the credential headers in the registry entry, or keep the endpoint answering the probe so its auth can be classified.

  • Tools listed15 pts

    Answer tools/list without a credential, or ship a package that starts in a sandbox without one.

  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts
  • License10 pts

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