Date Calculator MCP: exact date math and holidays in your AI app

Count the days between two dates, add or subtract weeks and months, and look up public holidays by country, using the same calculator as onlinealarmkur.com. Date Calculator is a free public server, so ContextGate adds it to Claude, ChatGPT and Cursor without a sign-in, and Activity shows each calculation your AI app ran instead of guessing.

  • Ready to connect
  • Free
  • 4 example tools

Give your AI app a date calculator

  1. 1Click Connect Date Calculator free. There's no sign-in, so its tools are ready at once.
  2. 2The four tools only calculate and look up: `count_days`, `shift_date`, `get_holidays` and `list_locations`. Keep them all, or switch off `get_holidays` if you only need plain date math.
  3. 3Add ContextGate to your AI app as a connector or MCP server. The steps for each app are on the Works with page.
  4. 4Ask your AI app how many working days are left before a deadline, leaving out public holidays in your country, then open Activity to see the `count_days` call.

Date questions your AI app can get right

  • Count calendar days, or only the days that match your rules, between two dates with `count_days`.
  • Add or subtract years, months, weeks and days from a date with `shift_date`, using the website calculator's rules.
  • Look up public holidays, including observed dates, for a country or region with `get_holidays`.
  • Check which countries, regions and years are covered with `list_locations`.

What ContextGate keeps track of

  • Activity records each date calculation your team's AI apps make.
  • Switch off any of the four tools and it leaves your AI apps' tool lists.

What you get with Date Calculator and ContextGate

  • Your AI apps can use Date CalculatorClaude, Cursor, ChatGPT and other AI apps reach Date Calculator through the one ContextGate connection you add to them.
  • You choose which tools they can useSwitch off any Date Calculator tool you don't want used. It's hidden from your AI apps and refused if called.
  • Every call is checked and recordedYour policies check each call (for example, personal data is hidden and secrets are blocked), and Activity keeps a record of it.

ContextGate sees only the tool calls that go through it, not your AI app's built-in tools or your chats.

Date Calculator tools

Examples of what your AI apps can do in Date Calculator. You'll see the exact list of tools after you connect it.