---
title: "Dates and calendar - Free calculators | Numequo"
description: "Compare dates, calculate ages and navigate calendar intervals precisely. Get a clear result with the formula, examples and useful explanations."
canonical: "https://www.numequo.com/time/dates-calendar/"
locale: "en"
---
[Numequo](https://www.numequo.com/) › [Time](https://www.numequo.com/time/)

# Dates and calendar

Compare dates, calculate ages and navigate calendar intervals precisely.

## Available tools

- [Age Calculator](https://www.numequo.com/time/dates-calendar/age-calculator/) - Calculate an exact age between two dates.
- [Date Difference Calculator](https://www.numequo.com/time/dates-calendar/date-difference-calculator/) - Count days and weeks between any two dates.
- [Date Add or Subtract Calculator](https://www.numequo.com/time/dates-calendar/date-add-subtract-calculator/) - Add or subtract days, weeks, months or years from any calendar date.
- [Business Days Calculator](https://www.numequo.com/time/dates-calendar/business-days-calculator/) - Count business days between two dates with configurable weekends and holidays.
- [Due Date Calculator](https://www.numequo.com/time/dates-calendar/due-date-calculator/) - Add calendar, business or working days to calculate a due date.
- [ISO Week Number Calculator](https://www.numequo.com/time/dates-calendar/iso-week-number-calculator/) - Find the ISO week number and week-based year for any date.
- [Day of the Week Calculator](https://www.numequo.com/time/dates-calendar/day-of-week-calculator/) - Find which weekday corresponds to any valid calendar date.
- [Date Countdown Calculator](https://www.numequo.com/time/dates-calendar/date-countdown-calculator/) - Count the days remaining from today until a chosen date.
- [Leap Year Calculator](https://www.numequo.com/time/dates-calendar/leap-year-calculator/) - Check whether a Gregorian calendar year contains 365 or 366 days.

## Compare dates, calculate ages and navigate calendar intervals precisely.

Calendar calculations depend on whether you count calendar days, working days or complete weeks. Naming that rule prevents most date mistakes.

Review the start and end dates, inclusion rule and local holidays before using a result for an administrative or contractual deadline.

### Tools to explore next

- [Age Calculator](https://www.numequo.com/time/dates-calendar/age-calculator/) - Calculate an exact age between two dates.
- [Date Difference Calculator](https://www.numequo.com/time/dates-calendar/date-difference-calculator/) - Count days and weeks between any two dates.
- [Date Add or Subtract Calculator](https://www.numequo.com/time/dates-calendar/date-add-subtract-calculator/) - Add or subtract days, weeks, months or years from any calendar date.
- [Business Days Calculator](https://www.numequo.com/time/dates-calendar/business-days-calculator/) - Count business days between two dates with configurable weekends and holidays.
- [Due Date Calculator](https://www.numequo.com/time/dates-calendar/due-date-calculator/) - Add calendar, business or working days to calculate a due date.

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