In-depth guides and free calculators covering every aspect of date and day calculations — built for Australia.
Calculate the exact number of days between any two dates. Covers visa tracking, payment terms, project planning, and leap year handling.
Read article → CalculatorAdd or subtract any number of days from a date. Includes leap year rules, ISO 8601 format, and real-world examples for Australia.
Read article → CalculatorCount Monday–Friday working days between any two dates. Covers Fair Work notice periods, payment terms, and Australian public holidays.
Read article → GuideA detailed walkthrough of how to manually count days between dates, plus worked examples and the ISO 8601 duration notation explained.
Read article → CalculatorFind the day of the week for any date, calculate ISO week numbers, and perform advanced calendar arithmetic using the Gregorian system.
Read article → CalculatorCalculate your exact age in days from your birthdate. Includes milestone tables (1,000, 5,000, 10,000 days) and leap year birthdays.
Read article → CalculatorFind the ISO 8601 week number for any date. Covers the 53-week year, week-year boundaries, and Australian business scheduling.
Read article → CalculatorCount down the days to Christmas, EOFY, a deadline, or any event. Includes popular Australian countdowns and days-since mode.
Read article → CalculatorMeasure the precise interval between two dates in years, months, and days — the human-readable format used for age, tenure, and leases.
Read article → ReferenceEvery Australian public holiday by state and territory, Fair Work entitlements, penalty rates, and a live next-holiday finder tool.
Read article → CalculatorMeasure any date interval simultaneously in years, months, weeks, and days. Includes ISO 8601 duration notation and Australian financial year context.
Read article → GuideEverything you need to know about counting days online — accuracy, privacy, leap years, legal uses, and common Australian day-count examples.
Read article → CalculatorCount Saturdays and Sundays between any two dates. Covers weekend penalty rates under Fair Work, rostering, and the weekday-to-weekend ratio.
Read article → GuideFind the day of the week for any date, explore all calculators, and understand Australian date formats, the Gregorian calendar, and ISO 8601.
Read article → CalculatorCheck any year with the three-rule Gregorian formula. Covers the history of leap years, leap day birthdays, and upcoming leap years to 2100.
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