{
  "title": "Time duration",
  "human_url": "https://happytails.ai/en/date-time-tools/time-duration/",
  "agent_url": "https://happytails.ai/agents/en/date-time-tools/time-duration/",
  "language": "en",
  "markdown_url": "https://happytails.ai/en/date-time-tools/time-duration.md",
  "content": "Time duration\nStart/end times, crossing midnight, breaks, decimal hours and explicit timezone handling..\nUseful next steps\nDate difference\nInclusive/exclusive counting, leap years, calendar dates versus elapsed time.\nTime zone converter\nIANA zones, date selection and DST ambiguity.\nBusiness days\nCustom weekends first.\nHow to use Time duration\nEnter your text in the input field.\nThe result updates as you type. Adjust the available settings if needed.\nReview the result, then use Copy result or a download link when available.\nWorking with time duration\nDate 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.\nCommon questions\nAre all days exactly 24 hours long?\nElapsed time across a daylight-saving transition can differ from a simple calendar-day count. Use the measure relevant to your schedule.\nWhy can the same timestamp show different dates?\nA 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.\nContinue your workflow:\nDate difference\n,\nTime zone converter\n,\nBusiness days\n.",
  "content_format": "text/plain",
  "visibility": "public",
  "links": [
    {
      "name": "Date difference Inclusive/exclusive counting, leap years, calendar dates versus elapsed time.",
      "url": "https://happytails.ai/en/date-time-tools/date-difference/"
    },
    {
      "name": "Time zone converter IANA zones, date selection and DST ambiguity.",
      "url": "https://happytails.ai/en/date-time-tools/time-zone-converter/"
    },
    {
      "name": "Business days Custom weekends first.",
      "url": "https://happytails.ai/en/date-time-tools/business-days/"
    }
  ],
  "tool": {
    "id": "time-duration",
    "category": "date-time-tools",
    "built": true,
    "requirements": "Start/end times, crossing midnight, breaks, decimal hours and explicit timezone handling.",
    "implementation": {
      "fields": [
        {
          "key": "start",
          "label": "Start time",
          "value": "09:00",
          "type": "text"
        },
        {
          "key": "end",
          "label": "End time",
          "value": "17:00",
          "type": "text"
        },
        {
          "key": "break",
          "label": "Unpaid break (minutes)",
          "value": 30,
          "type": "number"
        },
        {
          "key": "overnight",
          "label": "Ends next day",
          "value": false,
          "type": "checkbox"
        },
        {
          "key": "rate",
          "label": "Hourly rate",
          "value": 20,
          "type": "number"
        }
      ],
      "experience": {
        "automatic": true,
        "single": false,
        "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.",
        "action": null
      },
      "mode": "automatic",
      "interactive": false
    },
    "execution": "POST /api/v1/tools/time-duration/run",
    "api": {
      "id": "time-duration",
      "name": "Time duration",
      "category": "date-time-tools",
      "description": "Start/end times, crossing midnight, breaks, decimal hours and explicit timezone handling.",
      "notes": "",
      "human_path": "/en/date-time-tools/time-duration/",
      "method": "POST",
      "endpoint": "/api/v1/tools/time-duration/run",
      "schema_url": "/api/v1/tools/time-duration",
      "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 time",
                "default": "09:00"
              },
              "end": {
                "type": "string",
                "description": "End time",
                "default": "17:00"
              },
              "break": {
                "type": "number",
                "description": "Unpaid break (minutes)",
                "default": 30.0
              },
              "overnight": {
                "type": "boolean",
                "description": "Ends next day",
                "default": false
              },
              "rate": {
                "type": "number",
                "description": "Hourly rate",
                "default": 20.0
              }
            }
          }
        }
      },
      "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"
    }
  },
  "markdown": "# Time duration\n\n- Human page: https://happytails.ai/en/date-time-tools/time-duration/\n- Markdown: https://happytails.ai/en/date-time-tools/time-duration.md\n- Structured JSON: https://happytails.ai/agents/en/date-time-tools/time-duration/index.json\n- Visibility: public\n\n## Tool capabilities\n\n| Property | Value |\n| --- | --- |\n| Tool ID | `time-duration` |\n| Category | date-time-tools |\n| Implementation | Registered implementation. Registration alone is not a production-quality guarantee. |\n| Browser execution | Automatic updates after valid input or file selection. |\n| Browser processing | Browser; see tool notes for network behavior. |\n| HTTP API | /api/v1/tools/time-duration/run |\n| Browser-agent interface | run_current_tool |\n\n### Inputs and settings\n\nText input: Your text.\n\nExample or placeholder shown in the interface (not a validated fixture):\n\n```text\nHello world!\n```\n\nChange the input or settings to update your result. Results update as you type. Up to 1,000,000 characters.\n\n| Setting | Meaning | Control type | Default | Constraints |\n| --- | --- | --- | --- | --- |\n| `start` | Start time | text | \"09:00\" |  |\n| `end` | End time | text | \"17:00\" |  |\n| `break` | Unpaid break (minutes) | number | 30 |  |\n| `overnight` | Ends next day | checkbox | false |  |\n| `rate` | Hourly rate | number | 20 |  |\n\n### HTTP contract\n\nAPI calls process supplied data on the server. The website origin is `https://happytails.ai`. Server API hosting is not connected on the public website yet. Use your local server origin to test these requests.\n\n```http\nPOST https://happytails.ai/api/v1/tools/time-duration/run\nContent-Type: application/json\n```\n\n[Detailed operation reference](https://happytails.ai/en/api/tools/time-duration.md) · [Shared API guide](https://happytails.ai/en/api.md)\n\n#### Limits\n\n| Limit | Value |\n| --- | --- |\n| request_bytes | 8388608 |\n| input_characters | 1000000 |\n| files_bytes | 5242880 |\n| max_files | 0 |\n| timeout_seconds | 12 |\n\n#### Complete input schema\n\n```json\n{\n  \"type\": \"object\",\n  \"additionalProperties\": false,\n  \"properties\": {\n    \"input\": {\n      \"type\": \"string\",\n      \"maxLength\": 1000000,\n      \"default\": \"\",\n      \"description\": \"Plain text input. File tools use files instead unless otherwise documented.\"\n    },\n    \"options\": {\n      \"type\": \"object\",\n      \"additionalProperties\": false,\n      \"properties\": {\n        \"start\": {\n          \"type\": \"string\",\n          \"description\": \"Start time\",\n          \"default\": \"09:00\"\n        },\n        \"end\": {\n          \"type\": \"string\",\n          \"description\": \"End time\",\n          \"default\": \"17:00\"\n        },\n        \"break\": {\n          \"type\": \"number\",\n          \"description\": \"Unpaid break (minutes)\",\n          \"default\": 30.0\n        },\n        \"overnight\": {\n          \"type\": \"boolean\",\n          \"description\": \"Ends next day\",\n          \"default\": false\n        },\n        \"rate\": {\n          \"type\": \"number\",\n          \"description\": \"Hourly rate\",\n          \"default\": 20.0\n        }\n      }\n    }\n  }\n}\n```\n\n#### Complete output schema\n\n```json\n{\n  \"type\": \"object\",\n  \"required\": [\n    \"tool\",\n    \"result\"\n  ],\n  \"properties\": {\n    \"tool\": {\n      \"type\": \"string\"\n    },\n    \"result\": {\n      \"type\": \"object\",\n      \"required\": [\n        \"text\",\n        \"files\"\n      ],\n      \"properties\": {\n        \"text\": {\n          \"type\": [\n            \"string\",\n            \"null\"\n          ]\n        },\n        \"data\": {\n          \"description\": \"Parsed JSON when the textual result is JSON.\"\n        },\n        \"name\": {\n          \"type\": \"string\"\n        },\n        \"mime\": {\n          \"type\": \"string\"\n        },\n        \"files\": {\n          \"type\": \"array\",\n          \"items\": {\n            \"type\": \"object\",\n            \"required\": [\n              \"name\",\n              \"mime\",\n              \"bytes\",\n              \"base64\"\n            ],\n            \"properties\": {\n              \"name\": {\n                \"type\": \"string\"\n              },\n              \"mime\": {\n                \"type\": \"string\"\n              },\n              \"bytes\": {\n                \"type\": \"integer\"\n              },\n              \"base64\": {\n                \"type\": \"string\",\n                \"contentEncoding\": \"base64\"\n              }\n            }\n          }\n        }\n      }\n    }\n  }\n}\n```\n\n#### Error and retry handling\n\nFailures return a non-200 status and `error.code` plus `error.message`. Correct invalid input before retrying; retry server-busy responses with bounded backoff. Returned files contain Base64 data, not persistent download URLs. Decode and inspect the output before treating conversion as successful. See the shared API guide for the complete status and timeout rules.\n\n### Browser-agent workflow\n\n1. Open the human page in a browser that supports WebMCP.\n2. Discover the interface exposed by that page; use its actual schema.\n3. Select files on the page first when the tool requires files.\n4. Call `run_current_tool` with valid input and settings.\n5. Inspect the returned result or error and the displayed output. Retrieve files from the displayed download links.\n\nCalls do not automatically copy or download results. Browser permissions still apply. Interface availability alone is not proof of successful execution.\n\n### Planning specification\n\nStart/end times, crossing midnight, breaks, decimal hours and explicit timezone handling.\n\nThis describes intended requirements. Use the implementation notes, interface schema and observed output to determine current support.\n\n### Complete machine-readable capability record\n\n```json\n{\n  \"id\": \"time-duration\",\n  \"category\": \"date-time-tools\",\n  \"built\": true,\n  \"requirements\": \"Start/end times, crossing midnight, breaks, decimal hours and explicit timezone handling.\",\n  \"implementation\": {\n    \"fields\": [\n      {\n        \"key\": \"start\",\n        \"label\": \"Start time\",\n        \"value\": \"09:00\",\n        \"type\": \"text\"\n      },\n      {\n        \"key\": \"end\",\n        \"label\": \"End time\",\n        \"value\": \"17:00\",\n        \"type\": \"text\"\n      },\n      {\n        \"key\": \"break\",\n        \"label\": \"Unpaid break (minutes)\",\n        \"value\": 30,\n        \"type\": \"number\"\n      },\n      {\n        \"key\": \"overnight\",\n        \"label\": \"Ends next day\",\n        \"value\": false,\n        \"type\": \"checkbox\"\n      },\n      {\n        \"key\": \"rate\",\n        \"label\": \"Hourly rate\",\n        \"value\": 20,\n        \"type\": \"number\"\n      }\n    ],\n    \"experience\": {\n      \"automatic\": true,\n      \"single\": false,\n      \"label\": \"Your text\",\n      \"placeholder\": \"Hello world!\",\n      \"help\": \"Change the input or settings to update your result. Results update as you type. Up to 1,000,000 characters.\",\n      \"action\": null\n    },\n    \"mode\": \"automatic\",\n    \"interactive\": false\n  },\n  \"execution\": \"POST /api/v1/tools/time-duration/run\",\n  \"api\": {\n    \"id\": \"time-duration\",\n    \"name\": \"Time duration\",\n    \"category\": \"date-time-tools\",\n    \"description\": \"Start/end times, crossing midnight, breaks, decimal hours and explicit timezone handling.\",\n    \"notes\": \"\",\n    \"human_path\": \"/en/date-time-tools/time-duration/\",\n    \"method\": \"POST\",\n    \"endpoint\": \"/api/v1/tools/time-duration/run\",\n    \"schema_url\": \"/api/v1/tools/time-duration\",\n    \"input_schema\": {\n      \"type\": \"object\",\n      \"additionalProperties\": false,\n      \"properties\": {\n        \"input\": {\n          \"type\": \"string\",\n          \"maxLength\": 1000000,\n          \"default\": \"\",\n          \"description\": \"Plain text input. File tools use files instead unless otherwise documented.\"\n        },\n        \"options\": {\n          \"type\": \"object\",\n          \"additionalProperties\": false,\n          \"properties\": {\n            \"start\": {\n              \"type\": \"string\",\n              \"description\": \"Start time\",\n              \"default\": \"09:00\"\n            },\n            \"end\": {\n              \"type\": \"string\",\n              \"description\": \"End time\",\n              \"default\": \"17:00\"\n            },\n            \"break\": {\n              \"type\": \"number\",\n              \"description\": \"Unpaid break (minutes)\",\n              \"default\": 30.0\n            },\n            \"overnight\": {\n              \"type\": \"boolean\",\n              \"description\": \"Ends next day\",\n              \"default\": false\n            },\n            \"rate\": {\n              \"type\": \"number\",\n              \"description\": \"Hourly rate\",\n              \"default\": 20.0\n            }\n          }\n        }\n      }\n    },\n    \"output_schema\": {\n      \"type\": \"object\",\n      \"required\": [\n        \"tool\",\n        \"result\"\n      ],\n      \"properties\": {\n        \"tool\": {\n          \"type\": \"string\"\n        },\n        \"result\": {\n          \"type\": \"object\",\n          \"required\": [\n            \"text\",\n            \"files\"\n          ],\n          \"properties\": {\n            \"text\": {\n              \"type\": [\n                \"string\",\n                \"null\"\n              ]\n            },\n            \"data\": {\n              \"description\": \"Parsed JSON when the textual result is JSON.\"\n            },\n            \"name\": {\n              \"type\": \"string\"\n            },\n            \"mime\": {\n              \"type\": \"string\"\n            },\n            \"files\": {\n              \"type\": \"array\",\n              \"items\": {\n                \"type\": \"object\",\n                \"required\": [\n                  \"name\",\n                  \"mime\",\n                  \"bytes\",\n                  \"base64\"\n                ],\n                \"properties\": {\n                  \"name\": {\n                    \"type\": \"string\"\n                  },\n                  \"mime\": {\n                    \"type\": \"string\"\n                  },\n                  \"bytes\": {\n                    \"type\": \"integer\"\n                  },\n                  \"base64\": {\n                    \"type\": \"string\",\n                    \"contentEncoding\": \"base64\"\n                  }\n                }\n              }\n            }\n          }\n        }\n      }\n    },\n    \"processing\": \"Server; same transformation code as browser tools\",\n    \"limits\": {\n      \"request_bytes\": 8388608,\n      \"input_characters\": 1000000,\n      \"files_bytes\": 5242880,\n      \"max_files\": 0,\n      \"timeout_seconds\": 12\n    }\n  },\n  \"agent_processing\": \"Server; same transformation code as browser tools\",\n  \"browser_agent\": {\n    \"supported\": true,\n    \"name\": \"run_current_tool\",\n    \"discovery\": \"WebMCP on the human page in a supporting browser\",\n    \"verification\": \"See audit/API-AUDIT.md; availability is not verification\"\n  }\n}\n```\n\n## Page guide\n\nStart/end times, crossing midnight, breaks, decimal hours and explicit timezone handling..\n\n## Useful next steps\n\n- [Date difference](https://happytails.ai/en/date-time-tools/date-difference/): Inclusive/exclusive counting, leap years, calendar dates versus elapsed time. ([Markdown](https://happytails.ai/en/date-time-tools/date-difference.md))\n\n- [Time zone converter](https://happytails.ai/en/date-time-tools/time-zone-converter/): IANA zones, date selection and DST ambiguity. ([Markdown](https://happytails.ai/en/date-time-tools/time-zone-converter.md))\n\n- [Business days](https://happytails.ai/en/date-time-tools/business-days/): Custom weekends first. ([Markdown](https://happytails.ai/en/date-time-tools/business-days.md))\n\n## How to use Time duration\n\n1. Enter your text in the input field.\n2. The result updates as you type. Adjust the available settings if needed.\n3. Review the result, then use Copy result or a download link when available.\n\n## Working with time duration\n\nDate 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.\n\n## Common questions\n\n### Are all days exactly 24 hours long?\n\nElapsed time across a daylight-saving transition can differ from a simple calendar-day count. Use the measure relevant to your schedule.\n\n### Why can the same timestamp show different dates?\n\nA 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.\n\nContinue your workflow: [Date difference](https://happytails.ai/en/date-time-tools/date-difference/), [Time zone converter](https://happytails.ai/en/date-time-tools/time-zone-converter/), [Business days](https://happytails.ai/en/date-time-tools/business-days/).\n"
}