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Zovo Date Calculator

by theluckystrike · remote · no sign-in to list tools · v1.0.0 · published by GitHub user theluckystrike

Days between dates & workdays

Changes · 1
CompareRegistry entry

3 tools: 1 change things and 2 only read.

Scanned Oct 22, 2026

No check matched anything in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http date-calculator https://date-calculator.zovo.one/mcp

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

3 tools

Changes things 1Claude Code: ask
  • calculate_date_offsetUse this when the user wants the date that is N days or N business days (working days) before or after a date: 'what date is 90 days from today', '30 business days from Nov 3, 2026…No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    Use this when the user wants the date that is N days or N business days (working days) before or after a date: 'what date is 90 days from today', '30 business days from Nov 3, 2026 in Germany', '10 working days before 2027-01-15', shipping or contract deadlines. Business days skip weekends and the public holidays of the given country and state, including observed weekdays for holidays that fall on a weekend (US July 4, 2027 is a Sunday, so Monday July 5 is skipped); the start date is not counted. For calendar days, roll=next_business_day moves a result that lands on a weekend or holiday to the next business day. Returns the date with its weekday, the holidays skipped, and a calendar (.ics) file. Results are informational: court and filing deadlines may have special rules (court holidays, service days). Does not handle times of day.

    Annotations the server declares

    • title: Find a date N days before or after
    • readOnlyHint: true
    • destructiveHint: false
    • openWorldHint: false
    • idempotentHint: true
Only reads 2Claude Code: allow
  • count_days_betweenUse this when the user asks how many days are between two dates (days between dates, count days, date calculator), how many business days or working days are between two dates, or …No findings

    Why it is in this group

    • The name "count_days_between" says "count": a word for reading.
    Description, as the server wrote it
    Use this when the user asks how many days are between two dates (days between dates, count days, date calculator), how many business days or working days are between two dates, or days between dates excluding weekends and public holidays for a country or US state. Returns calendar days, weeks and days, years/months/days, business days, and the holidays skipped by name. The start date is counted; set include_end_date=true to also count the end date (Excel NETWORKDAYS style). Does not handle times of day or time zones. Holidays that fall on a weekend are not double-counted, and their observed weekday off (for example US Independence Day 2026 on Saturday is observed Friday July 3) is skipped as a holiday. Results are informational: legal deadlines may have special rules such as court holidays. Do not use for writing SQL or spreadsheet formulas.

    Annotations the server declares

    • title: Count days between dates
    • readOnlyHint: true
    • destructiveHint: false
    • openWorldHint: false
    • idempotentHint: true
  • list_holidaysUse this when the user asks which public holidays (bank holidays) a country or a state/region has in a year, e.g.No findings

    Why it is in this group

    • The name "list_holidays" says "list": a word for reading.
    Description, as the server wrote it
    Use this when the user asks which public holidays (bank holidays) a country or a state/region has in a year, e.g. 'Poland public holidays 2026' or 'Texas state holidays 2027', usually to plan working days. Returns each holiday with date, weekday, English name and whether it falls on a weekend, including the observed weekday off when a holiday falls on a weekend, plus a CSV file. Does not include school holidays, religious observances that are not days off, or company-specific closures. Do not use to check whether a stock exchange is open.

    Annotations the server declares

    • title: List public holidays
    • readOnlyHint: true
    • destructiveHint: false
    • openWorldHint: false
    • idempotentHint: true

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Install

Pinned to version 1.0.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http date-calculator https://date-calculator.zovo.one/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__date-calculator__count_days_between",
      "mcp__date-calculator__list_holidays"
    ],
    "ask": [
      "mcp__date-calculator__calculate_date_offset"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as date-calculator. Review it before you use it.