Age Calculator & Date Calculator

It counts the whole years since your date of birth, then the whole months since your last birthday, then the days left over. Someone born on 15 June 1990 is 36 years, 3 months and 20 days old on 5 October 2026.

In years that aren't leap years, this calculator counts the birthday on 28 February. Conventions differ: some people celebrate on 1 March, and in some countries, such as the UK, 1 March is the legal birthday for things like coming of age.

By default it counts the days from the start date up to the end date, like nights in a hotel stay: Monday to Friday is 4 days. Tick “Include the end date” to count both, which makes Monday to Friday 5 days.

Adding a month to 31 January gives 28 February (29 in a leap year), because February has no 31st. In the same way, 31 January to 28 February counts as one whole month.

Choose “Days between”, pick the two dates and choose a country under “Public holidays”. The result shows the working days, which are Monday to Friday minus the public holidays and any extra days off you add, and lists the holidays that fell in the range. From 1 to 31 December 2026 with “Include the end date” ticked, for example, there are 23 weekdays but 21 working days in England, after Christmas Day on Friday 25 and the Boxing Day substitute on Monday 28.

United States: the 11 federal holidays, observed on the Friday before when they fall on a Saturday and the Monday after when they fall on a Sunday. United Kingdom: the bank holidays for England and Wales, Scotland or Northern Ireland, with a substitute day when one falls on a weekend. Canada: the 10 federal statutory holidays in the Canada Labour Code. Australia: the 7 national public holidays that every state and territory shares. Holidays are worked out from their rules, such as “last Monday in May” or “two days before Easter Sunday”, so any year works.

No. It includes New Year's Day, Australia Day, Good Friday, Easter Monday, Anzac Day, Christmas Day and Boxing Day, which every state and territory observes. State holidays such as Easter Saturday, the King's Birthday, Labour Day or Melbourne Cup Day differ from place to place, so add the ones that apply to you as extra days off. Anzac Day isn't moved when it falls on a weekend, because only some states add a Monday.

Past one-off UK bank holidays are included, such as the 2011 royal wedding, the 2012 and 2022 jubilees, the State Funeral on 19 September 2022 and the Coronation on 8 May 2023, as is Australia's National Day of Mourning on 22 September 2022. Future one-off holidays can't be known in advance, and one-off US and Canadian closures aren't included, so add any you need as extra days off.

Yes. In “Add / subtract”, tick “Count working days only” and choose a country. A deadline of “10 business days from today” then skips weekends, public holidays and any extra days off you add, and the result lists the holidays it stepped over.

Yes. “Working days CSV” saves every weekday in the range, marked as a numbered working day, a public holiday or a day off, ready for a spreadsheet. “Days off .ics” saves the holidays and extra days off as all-day events to import into Google Calendar, Outlook or Apple Calendar. Very long ranges stop at 10,000 weekdays in the CSV and 2,000 days off in the calendar file, and the page says when that happens.

Any date from the year 1 to 9999, using the modern (Gregorian) calendar throughout. Dates are treated as whole calendar days, so time zones and daylight saving changes don't affect the results.

No. Everything, including the public holidays, is worked out in your browser, and nothing is saved or uploaded.