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Every page on Dates & Times in one place: 37 calculators, bank holiday pages, guides and UK data pages. Looking for something specific? Try the search page.

Calculators and tools

All date and time calculators: countdown, age, date difference, leave | Dates & Times Every Dates & Times calculator in one place. Countdown, exact age, days between dates, the long-weekend maximiser and statutory holiday entitlement, each showing the date maths and UK source behind it.
HMRC Statutory Residence Test day counter: UK day bands | Dates & Times Check which day-count band of the HMRC Statutory Residence Test your UK days fall in, including the 183-day automatic-residence threshold and the sufficient-ties ranges. Counts days, does not decide residence.
Moon phase calculator: phase, illumination and next full moon | Dates & Times Find the moon phase, illuminated percentage and the moon age for any date, plus the next new and full moon. Uses the standard 29.53-day synodic-month formula.
School holiday overlap detector: does your trip fall in term time? | Dates & Times Check whether a date range lands in the England school holidays or term time, and how many days overlap each holiday, so you can line up your leave with the kids being off. Representative 2026 dates.
Shift pattern generator: project a 4-on-4-off rota forward | Dates & Times Project a shift rota such as 4 on 4 off forward from your start date and see every work day and rest day, week by week, with totals. Supports common patterns or your own custom block.
Sleep calculator: best bedtime and wake time by 90-minute cycles | Dates & Times Work out when to go to bed, or when to wake, so you finish a full 90-minute sleep cycle and wake less groggy. Free, instant, and it shows the cycle maths behind the times.
Sunrise and sunset calculator: times, solar noon and day length | Dates & Times Sunrise, sunset, solar noon and day length for any UK location and date, using the standard NOAA solar formula. Pick a city or enter your own latitude and longitude. Times in UK local time.
Time-zone converter and meeting planner: one time in every city | Dates & Times Convert a date and time from one time zone to several others at once, with a working-hours flag for each city, so you can plan an international meeting. Daylight saving handled automatically.
Week number calculator: ISO week from a date, and dates from a week | Dates & Times Find the ISO 8601 week number for any date, or turn a week number back into its Monday-to-Sunday dates. Uses the international standard where week 1 holds the first Thursday.

Bank holidays and countdowns

State Pension age calculator: your pension age and date from your DOB | Dates & Times Find your UK State Pension age and the date you reach it from your date of birth, under the current Pensions Act rules: 66 now, rising to 67 then 68. Free, instant, shows the rules.
UK bank holidays : dates for all four nations, next holiday and Easter | Dates & Times The UK bank holidays for England and Wales, Scotland and Northern Ireland, when the next one falls, and when Easter and the clocks change, with the official gov.uk source.
UK tax year deadline countdown: 31 January, 5 April and more | Dates & Times A live countdown to the next UK tax-year and Self Assessment deadlines: 5 April year end, 31 January online filing, 31 July payment on account, 31 October paper return and 5 October registration.

Annual leave and entitlement

Annual leave: long-weekend maximiser and holiday entitlement calculator | Dates & Times Turn a few annual leave days into long breaks by booking around the 2026 UK bank holidays, and work out your statutory holiday entitlement, with the gov.uk and Working Time Regulations rules shown in full.
Irregular hours holiday accrual calculator: the 12.07% method | Dates & Times Work out paid holiday for irregular-hours and part-year workers at 12.07% of hours worked, in hours, days and rolled-up holiday pay. Follows the GOV.UK Working Time Regulations method.

Guides

Date and leave guides: bank holidays, working days and entitlement | Dates & Times Plain-English guides to UK bank holidays, annual leave, holiday entitlement and working days, each citing the official gov.uk source and linking to the calculator that does the maths.
How to calculate working days between two dates (UK) | Dates & Times What counts as a working day, how to count Monday to Friday between two dates, and where UK bank holidays fit in. With a worked example and the calculator that does it.
How to maximise your annual leave with UK bank holidays (2026) | Dates & Times Book your annual leave around the 2026 UK bank holidays to turn a few days off into long breaks. The bridging method explained, with the official gov.uk dates.
UK holiday entitlement explained: part-time and irregular hours | Dates & Times How statutory UK holiday entitlement works: the 5.6 weeks minimum, the 28-day cap, pro-rata for part-time staff and the 12.07% method for irregular and casual hours.
When are the 2026 UK bank holidays? All dates by nation | Dates & Times Every 2026 UK bank-holiday date for England and Wales, Scotland and Northern Ireland, with the day of the week and which nations each one applies in. Source: gov.uk.

UK calendar data

State Pension age timetable (UK) When you reach State Pension age in the UK by birth date: 66 now, rising to 67 from April 2026, with 68 legislated for 2044 to 2046.
UK bank holidays by nation, and | Dates & Times Every UK bank holiday for England and Wales, Scotland and Northern Ireland in and , as a clean data table. Auto-updated from the official gov.uk Bank Holidays feed at build time.
UK calendar data: working days, bank holidays vs the world | Dates & Times How the UK calendar compares: working days in 2026, public holidays against other countries, and the official gov.uk Bank Holidays feed behind it all.
When do the clocks change? UK dates UK clock-change dates: forward one hour on the last Sunday of March (BST begins) and back on the last Sunday of October (GMT). 2026 and 2027 dates and the rule.

Statistics

UK bank holidays and working days statistics 2026 | Dates & Times How many bank holidays and working days the UK has in 2026, per nation, against other countries, with every figure cited to gov.uk, ONS and OECD.

About

About Dates & Times Dates & Times is an independent UK calendar, dates and time information service, operated by Best Business Loans Ltd, with a named editor and cited official sources.

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, Editor, Dates & Times is the named editor of Dates & Times, the UK calendar, dates and time tools site, and a director of its operating company, accountable for the site's editorial standards and sourcing.
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Data API

Dates & Times Data API and MCP: UK date maths and bank holidays | Dates & Times Read-only public API and MCP server for UK date maths: age, date difference and working days, statutory holiday entitlement, the long-weekend maximiser, and the 2026 UK bank holidays. OpenAPI 3.1, CC BY 4.0.

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Dates & Times: UK calendar, dates and time calculators Free UK calendar and time tools: bank holidays, long-weekend planning, exact age, days between dates and statutory holiday entitlement. Every tool shows the date maths and its source.

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Terms of use The terms for using Dates & Times: general calendar and time information and calculators, not professional advice, plus how advertising and links work.

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