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- Business Days & Countdown Calculator
Count calendar or business days between two dates, exclude custom weekend patterns and holiday lists, and jump forward or backward by N business days.
- Speed–Distance–Time Calculator with Pace & ETA
Calculate speed, distance, or time from the other two. Includes unit conversions, pace output for running, and optional ETA from a start time.
- Age Difference Calculator
Compare two birth dates and see the exact age gap in years, months, weeks, and days, who is older, and when the younger person reaches the older age.
- Birth Year Calculator
Estimate possible birth years from age and a reference date.
- Date & Time Calculators: Days, Deadline Countdown
Calculate days between dates, see calendar days, business days, and hours left to a deadline, compare time zones, and find meeting overlap windows.
- Days Until Calculator
Count days until any date or event. See weeks, weekend days, business days, presets, custom holidays, and a shareable link for birthdays, exams, and holidays.
- Deadline Countdown Calculator
See remaining calendar days, business days, and business hours until a deadline in one page.
- Event Countdown (Time Remaining)
Show time remaining until a target date/time with an analog + digital display.
- Fiscal Week, Week Number & Quarter Calculator
Find fiscal week, ISO week, calendar quarter, fiscal quarter, and fiscal year for any date.
- Meeting Time Overlap Finder
Find overlapping meeting windows across two to four cities, compare local times, and share the best candidate slot without opening a full meeting planner.
- Military Time Converter: 24 Hour to 12 Hour, AM/PM
Convert military time to AM/PM and AM/PM to 24-hour time instantly.
- Recurring counter: counts in range, next date, Nth
Count how many times a recurring event happens in a date range.
- Time Zone Meeting Planner: Best Meeting Time
Find overlapping meeting windows across time zones with ranked suggestions and a shareable plan.
- Work Hours & Overtime Pay
Estimate worked time, overtime hours, and gross pay from shift start/end times, unpaid breaks, or known total hours.
- World Clock Board (Multiple Time Zones)
Compare multiple city times with analog + digital clocks, work-hour highlights, shareable URLs, and JSON export/import.
Featured
Popular date & time tools picked for quick access.
- Age Calculator
Calculate exact age from date of birth in years, months and days.
- Date Difference Calculator (days, business days, Y/M/D)
Compute days between dates, count business days and working hours, and see a year‑month‑day breakdown.
- Add Hours & Minutes Calculator
Add or subtract hours and minutes in HH:MM or HH:MM:SS format.
- Time Zone Converter (Instant World Clock)
Enter a date and time to convert between time zones, with automatic daylight‑saving shifts, presets for major cities, and a shareable result link.
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Pick the right date & time tool
Use this hub when you know the job but not the exact calculator yet. Open one path below, finish that task, then return only if you need a second step.
- Count days or compare two dates: start with Date Difference.
- Skip weekends or add working days: open Business Days.
- Check age from date of birth or a reference date: use Age Calculator.
- Convert a meeting time across cities: go to Time Zone Converter or Meeting Planner.