{
  "title": "Date & time",
  "human_url": "https://happytails.ai/en/date-time-tools/",
  "agent_url": "https://happytails.ai/agents/en/date-time-tools/",
  "language": "en",
  "markdown_url": "https://happytails.ai/en/date-time-tools.md",
  "content": "Date & time\nFind the tool you need, then open it to get started.\nAll date & time\nAdd days\nAdd/subtract calendar days and expose timezone/calendar assumptions.\nAge calculator\nCalendar age and next birthday.\nBusiness days\nCustom weekends first.\nDate difference\nInclusive/exclusive counting, leap years, calendar dates versus elapsed time.\nStopwatch\nMeasure elapsed time and take lap readings.\nTime calculator\nAdd/subtract hours/minutes/seconds and convert decimal hours.\nTime card calculator\nDaily intervals, breaks and totals.\nTime duration\nStart/end times, crossing midnight, breaks, decimal hours and explicit timezone handling.\nTime zone converter\nIANA zones, date selection and DST ambiguity.\nTimer\nSet a countdown in seconds.\nMake dates, units and time zones explicit\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.\nHow to choose your next step\nChoose the intended time zone and verify whether the start or end date counts. For working-day calculations, check which holidays and weekends apply.\nCommon questions about date & time\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.",
  "content_format": "text/plain",
  "visibility": "public",
  "links": [
    {
      "name": "Add days Add/subtract calendar days and expose timezone/calendar assumptions.",
      "url": "https://happytails.ai/en/date-time-tools/add-days/"
    },
    {
      "name": "Age calculator Calendar age and next birthday.",
      "url": "https://happytails.ai/en/date-time-tools/age-calculator/"
    },
    {
      "name": "Business days Custom weekends first.",
      "url": "https://happytails.ai/en/date-time-tools/business-days/"
    },
    {
      "name": "Date difference Inclusive/exclusive counting, leap years, calendar dates versus elapsed time.",
      "url": "https://happytails.ai/en/date-time-tools/date-difference/"
    },
    {
      "name": "Stopwatch Measure elapsed time and take lap readings.",
      "url": "https://happytails.ai/en/date-time-tools/stopwatch/"
    },
    {
      "name": "Time calculator Add/subtract hours/minutes/seconds and convert decimal hours.",
      "url": "https://happytails.ai/en/date-time-tools/time-calculator/"
    },
    {
      "name": "Time card calculator Daily intervals, breaks and totals.",
      "url": "https://happytails.ai/en/date-time-tools/time-card-calculator/"
    },
    {
      "name": "Time duration Start/end times, crossing midnight, breaks, decimal hours and explicit timezone handling.",
      "url": "https://happytails.ai/en/date-time-tools/time-duration/"
    },
    {
      "name": "Time zone converter IANA zones, date selection and DST ambiguity.",
      "url": "https://happytails.ai/en/date-time-tools/time-zone-converter/"
    },
    {
      "name": "Timer Set a countdown in seconds.",
      "url": "https://happytails.ai/en/date-time-tools/timer/"
    }
  ],
  "markdown": "# Date & time\n\n- Human page: https://happytails.ai/en/date-time-tools/\n- Markdown: https://happytails.ai/en/date-time-tools.md\n- Structured JSON: https://happytails.ai/agents/en/date-time-tools/index.json\n- Visibility: public\n\n## Page guide\n\nFind the tool you need, then open it to get started.\n\n## All date & time\n\n- [Add days](https://happytails.ai/en/date-time-tools/add-days/): Add/subtract calendar days and expose timezone/calendar assumptions. ([Markdown](https://happytails.ai/en/date-time-tools/add-days.md))\n\n- [Age calculator](https://happytails.ai/en/date-time-tools/age-calculator/): Calendar age and next birthday. ([Markdown](https://happytails.ai/en/date-time-tools/age-calculator.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- [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- [Stopwatch](https://happytails.ai/en/date-time-tools/stopwatch/): Measure elapsed time and take lap readings. ([Markdown](https://happytails.ai/en/date-time-tools/stopwatch.md))\n\n- [Time calculator](https://happytails.ai/en/date-time-tools/time-calculator/): Add/subtract hours/minutes/seconds and convert decimal hours. ([Markdown](https://happytails.ai/en/date-time-tools/time-calculator.md))\n\n- [Time card calculator](https://happytails.ai/en/date-time-tools/time-card-calculator/): Daily intervals, breaks and totals. ([Markdown](https://happytails.ai/en/date-time-tools/time-card-calculator.md))\n\n- [Time duration](https://happytails.ai/en/date-time-tools/time-duration/): Start/end times, crossing midnight, breaks, decimal hours and explicit timezone handling. ([Markdown](https://happytails.ai/en/date-time-tools/time-duration.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- [Timer](https://happytails.ai/en/date-time-tools/timer/): Set a countdown in seconds. ([Markdown](https://happytails.ai/en/date-time-tools/timer.md))\n\n## Make dates, units and time zones explicit\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## How to choose your next step\n\nChoose the intended time zone and verify whether the start or end date counts. For working-day calculations, check which holidays and weekends apply.\n\n## Common questions about date & time\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"
}