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U.S. federal holidays with observed dates and business-day math. Example from an open-source kit.
Holiday Calendar is an MCP server entry in ChatHome Skills, sourced from Official MCP Registry and scored 78/100. As a Model Context Protocol server, it exposes tools that MCP-compatible LLM clients such as Claude, Cursor, and Copilot can call directly, extending an agent's reach beyond its built-in capabilities. ChatHome Skills discovered this entry through its daily ingest of official registries and GitHub discovery queries, and re-verifies repository facts, freshness signals, and install metadata on every run. The quality score weighs official-registry presence, a working install command, license clarity, GitHub star trajectory, and repository freshness — the full formula is on the Sources page. The install command above is ready to copy. Review the last-pushed date and repository status before adding Holiday Calendar to a production agent workflow; the snapshot facts below are point-in-time values from the most recent ingest.
mcp add com.modernmustardseed/holiday-calendar https://starter.modernmustardseed.com/holidaysReview the upstream source before running this command.
{
"_meta": {
"io.modelcontextprotocol.registry/official": {
"status": "active",
"isLatest": true,
"updatedAt": "2026-10-12T14:12:42.497351Z",
"publishedAt": "2026-10-12T14:12:42.497351Z",
"statusChangedAt": "2026-10-12T14:12:42.497351Z"
}
},
"server": {
"name": "com.modernmustardseed/holiday-calendar",
"icons": [
{
"src": "https://starter.modernmustardseed.com/apple-icon.png",
"mimeType": "image/png"
}
],
"title": "Holiday Calendar",
"$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
"remotes": [
{
"url": "https://starter.modernmustardseed.com/holidays",
"type": "streamable-http"
}
],
"version": "1.0.1",
"repository": {
"url": "https://github.com/ModernMustardSeed/small-business-mcp-starter",
"source": "github"
},
"websiteUrl": "https://starter.modernmustardseed.com/docs/holidays",
"description": "U.S. federal holidays with observed dates and business-day math. Example from an open-source kit."
}
}