Holiday Calendar MCP server

U.S. federal holidays with observed dates and business-day math. Example from an open-source kit.

Category: Productivity

● Online, checked 354 min ago · 386 ms

Source: official MCP Registry entry com.modernmustardseed/holiday-calendar · repository

Direct MCP URL and setup

CLAUDE CODE

claude mcp add --transport http com-modernmustardseed-holiday-calendar https://starter.modernmustardseed.com/holidays

CURSOR / VS CODE (mcp.json)

{ "mcpServers": { "com-modernmustardseed-holiday-calendar": { "url": "https://starter.modernmustardseed.com/holidays" } } }