Holiday Calendar for Claude Code

com.modernmustardseed/holiday-calendar

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

client:Claude Code transport:streamable-http tools:5

Install Holiday Calendar in Claude Code

run in your project directory

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

Adds it for this project only. Append --scope user to make it available everywhere. Claude Code docs