Date Math Calculator

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How to connect

Add it to any MCP client that supports remote servers.

{
  "mcpServers": {
    "date-math-calculator": {
      "type": "http",
      "url": "https://apished.com/mcp/v1/datemath"
    }
  }
}

6 tools

• datemath_add

  Adds years/months/days to date. years/months are applied together with end-of-month clamping — e.g. 2026-01-31 + 1 month = 2026-02-28, not an overflowed 2026-03-03. days is then applied as plain calendar-day arithmetic.

• datemath_age

  Age in whole years as of asOf (optional, defaults to the current UTC date). A Feb-29 birthDate is treated as falling on March 1 in a non-leap asOf year.

• datemath_businessdays

  Counts days in [from, to] (inclusive on both ends) whose weekday is in weekdays (default mon-fri) and which aren't in holidays.

• datemath_dayofweek

  Day of the week for date: both the weekday name and its ISO 8601 weekday number (1=Monday..7=Sunday).

• datemath_diff

  Day difference between two YYYY-MM-DD dates: to minus from, in whole days. Negative if to is before from.

• datemath_leapyear

  Checks whether year is a leap year in the Gregorian calendar.

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