Deterministic Datetime Engine MCP Server for Claude CodeGive Claude Code instant access to 3 tools to Add Business Days, Calculate Date Difference, Check Leap Year

Language Models are infamously bad at calendar math. If you ask an AI to "Add 45 business days to October 12th", it will almost always guess wrong because it cannot programmatically skip weekends and account for varying month lengths. The Datetime Operations MCP solves this by offloading temporal calculations to a strict V8 Javascript engine.

Claude Code registers Deterministic Datetime Engine as an MCP server in a single terminal command. Once connected, Claude Code discovers all 3 tools at runtime and can call them headlessly. ideal for CI/CD pipelines, cron jobs, and automated workflows where Deterministic Datetime Engine data drives decisions without human intervention.

The Superpowers

• Business Day Math: Add or subtract days while perfectly skipping Saturdays and Sundays. Essential for SLA calculations, billing cycles, or delivery estimates.
• Exact Date Differences: Need to know exactly how many days, months, or years passed between two dates? Stop guessing and get mathematically perfect totals instantly.
• Leap Year Logic: Flawlessly implements the Gregorian leap year algorithm (% 4 == 0 && % 100 !== 0).
• Privacy First (Local): Executes completely locally. Zero API latency.

The Deterministic Datetime Engine MCP Server exposes 3 tools through the Vinkius. Connect it to Claude Code in under two minutes — credentials fully managed, no infrastructure to provision, no vendor lock-in. Your configuration, your data, your control.