Time, Age & Calendar

Chronological age calculator, birthday countdown, and working business days between dates.

Time and date calculators count days, ages and annual leave accurately, using real calendar dates so leap years and months of 28, 30 or 31 days are handled properly. People use them for notice periods, project deadlines, contract dates, birthdays and checking how much holiday they are owed.

The Age Calculator gives your exact age in years, months and days, the total days and weeks you have lived, and a countdown to your next birthday with the weekday it falls on. Someone born on 15 June 1995 was 31 years, 3 months and 9 days old on 24 September 2026. You can also measure an age on any past or future date, which helps with age limits on forms and applications.

The Days Between Dates Calculator counts calendar days, working days and weekend days between two dates, and shows the gap in weeks and days. By default it counts from the start date up to, but not including, the end date, so 1 October to 25 December 2026 is 85 days, or 12 weeks and 1 day; tick a box to include the end date. It takes off bank holidays for England and Wales, Scotland or Northern Ireland, as published by GOV.UK, or US federal holidays, and lists each one it removed. 2026 has 261 weekdays, leaving 253 working days in England and Wales and 251 in Scotland.

The Holiday Entitlement Calculator is for UK workers. Almost everyone gets 5.6 weeks of paid holiday a year, which is 28 days on a 5-day week, and 28 days is the cap for anyone working more days. Part-time staff multiply their working days by 5.6, so 3 days a week gives 16.8 days. It also handles starting part way through a leave year, irregular-hours and part-year workers, who build up holiday at 12.07% of the hours they work, and NHS Agenda for Change contracts.