Day of week

An MCP tool from the Calculators server, hosted on mcp.hjlabs.in.

The weekday of any date, with its day of year, ISO week number, days left in the year and whether the year is a leap year.

Name on the gateway: math__day_of_week · read-only.

Parameters

Name	Type	Description
`date` required	`string`	ISO date "YYYY-MM-DD" or "today".

Through the Smart Gateway, any client can run it by name with call_tool, or let the gateway find it with search_tools:

call_tool arguments

{
  "name": "math__day_of_week",
  "arguments": {
    "date": "…"
  }
}

Or connect the Calculators server directly, which lists 28 tools including this one:

Run in your terminal

claude mcp add --transport http hj-math https://mcp.hjlabs.in/mcp/math \
  --header "Authorization: Bearer YOUR_API_KEY"

Use the day of week tool with date set to ….