happytails.ai

Business Days Calculator

Open Business Days Calculator on Happytails.ai. This view has the same page content and links, with explicit tool capabilities. Read the processing notes before using a tool.

Tool capabilities

{
  "id": "business-days",
  "category": "date-time-tools",
  "built": true,
  "requirements": "Custom weekends first; holiday calendars only when sourced/versioned by jurisdiction.",
  "implementation": {
    "fields": [
      {
        "key": "start",
        "label": "Start date",
        "value": "2026-01-01",
        "type": "date"
      },
      {
        "key": "end",
        "label": "End date",
        "value": "2026-12-31",
        "type": "date"
      },
      {
        "key": "holidays",
        "label": "Holidays to exclude (YYYY-MM-DD, comma separated)",
        "value": "",
        "type": "text"
      }
    ],
    "input": false,
    "experience": {
      "automatic": true,
      "single": false,
      "inputMaxLength": 1000000,
      "inputMode": "text",
      "label": "Your text",
      "placeholder": "Hello world!",
      "help": "Change the input or settings to update your result. Results update as you type. Up to 1,000,000 characters.",
      "helpParts": [
        "Change the input or settings to update your result.",
        "Results update as you type.",
        "Up to 1,000,000 characters."
      ],
      "action": null
    },
    "mode": "automatic",
    "interactive": false
  },
  "execution": "POST /api/v1/tools/business-days/run",
  "api": {
    "id": "business-days",
    "name": "Business days",
    "category": "date-time-tools",
    "description": "Custom weekends first.",
    "notes": "",
    "human_path": "/en/date-time-tools/business-days/",
    "method": "POST",
    "endpoint": "/api/v1/tools/business-days/run",
    "schema_url": "/api/v1/tools/business-days",
    "input_schema": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "input": {
          "type": "string",
          "maxLength": 1000000,
          "default": "",
          "description": "Plain text input. File tools use files instead unless otherwise documented."
        },
        "options": {
          "type": "object",
          "additionalProperties": false,
          "properties": {
            "start": {
              "type": "string",
              "description": "Start date",
              "default": "2026-01-01"
            },
            "end": {
              "type": "string",
              "description": "End date",
              "default": "2026-12-31"
            },
            "holidays": {
              "type": "string",
              "description": "Holidays to exclude (YYYY-MM-DD, comma separated)",
              "default": ""
            }
          }
        }
      }
    },
    "output_schema": {
      "type": "object",
      "required": [
        "tool",
        "result"
      ],
      "properties": {
        "tool": {
          "type": "string"
        },
        "result": {
          "type": "object",
          "required": [
            "text",
            "files"
          ],
          "properties": {
            "text": {
              "type": [
                "string",
                "null"
              ]
            },
            "data": {
              "description": "Parsed JSON when the textual result is JSON."
            },
            "name": {
              "type": "string"
            },
            "mime": {
              "type": "string"
            },
            "files": {
              "type": "array",
              "items": {
                "type": "object",
                "required": [
                  "name",
                  "mime",
                  "bytes",
                  "base64"
                ],
                "properties": {
                  "name": {
                    "type": "string"
                  },
                  "mime": {
                    "type": "string"
                  },
                  "bytes": {
                    "type": "integer"
                  },
                  "base64": {
                    "type": "string",
                    "contentEncoding": "base64"
                  }
                }
              }
            }
          }
        }
      }
    },
    "processing": "Server; same transformation code as browser tools",
    "limits": {
      "request_bytes": 8388608,
      "input_characters": 1000000,
      "files_bytes": 5242880,
      "max_files": 0,
      "timeout_seconds": 12
    }
  },
  "agent_processing": "Server; same transformation code as browser tools",
  "browser_agent": {
    "supported": true,
    "name": "run_current_tool",
    "discovery": "WebMCP on the human page in a supporting browser",
    "verification": "See audit/API-AUDIT.md; availability is not verification"
  }
}

Page guide

Count weekdays between dates, leaving out the holidays you enter.

How to use Business days
  1. Enter the values you want to calculate and choose the relevant units or settings.
  2. The result updates as you type. Adjust the available settings if needed.
  3. Review the result, then use Copy result or a download link when available.

Useful next steps

Working with business days

Date calculations can depend on calendar rules, time zones and whether endpoints are included. A duration in hours is different from a number of calendar days when daylight-saving changes occur.

Common questions

Are all days exactly 24 hours long?

Elapsed time across a daylight-saving transition can differ from a simple calendar-day count. Use the measure relevant to your schedule.

Why can the same timestamp show different dates?

A timestamp represents an instant, while a calendar date is interpreted in a time zone. Near midnight, the same instant can fall on different local dates.

Continue your workflow: Date difference, Add days, Time duration.