tilwhen date engine for Claude Code

com.tilwhen/tilwhen

Deterministic date arithmetic with auditable receipts: business days, due dates, holidays.

client:Claude Code transport:streamable-http tools:9

Install tilwhen date engine in Claude Code

run in your project directory

claude mcp add --transport http tilwhen https://mcp.tilwhen.com/mcp

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