Working days
Working-day mode counts Monday to Friday, then removes selected UK bank holidays and any custom non-working dates you enter.
Date & Time Tools
Planning helpers for everyday admin
Date and time helpers for planning.
Add days to a date
Move a date forward or backward by calendar days, weekdays or weeks.
What date is 14 days after today?
About date planning
AdminThese tools use plain calendar dates and simple durations, so they are best for planning, scheduling and admin estimates.
For formal deadlines, payroll, contracts or compliance, check the exact rules that apply to your situation.
Recent results
UK date calculator and time span converter
Use these date and time tools to add days to a date, subtract days, count the days between two dates, estimate working days between dates, find deadlines, calculate age or time since, generate recurring dates and convert hours, minutes, days and weeks for planning.
Working day and business day estimates can exclude UK bank holidays for England & Wales, Scotland or Northern Ireland. Extra non-working days can be entered in DD-MM-YYYY format for annual leave, office closures or local holidays.
How to use the date tools
Choose the mode that matches the question you are asking. Add days when you need a date in the future or past, date difference when you want to count the gap between two dates, working days when weekends and bank holidays matter, and recurring dates when you need a simple schedule. The result card gives the answer, while the steps explain what was counted or excluded.
Calendar-day calculations count every day. Weekday calculations usually count Monday to Friday. Working-day calculations go a step further by removing selected UK bank holidays and any custom non-working days you enter. That distinction is important because "14 days from today" and "14 working days from today" can land on very different dates.
Examples of date planning
If a document is due 10 working days after a start date, choose the working-day mode, select the relevant UK nation and enter the start date. If a project milestone is simply 6 weeks away, calendar weeks may be more appropriate. If you are comparing two periods, the date difference mode can show the total span in days and make the period easier to explain.
The age and time-since modes are useful for everyday checks such as how long ago something happened, how old someone is on a particular date, or how many months sit between two dates. Month differences can be less intuitive than day differences because months have different lengths, so the calculator shows the method in plain language.
Important limitations
This page is intended for planning, scheduling and admin estimates. It does not replace legal deadline rules, payroll cut-off rules, court rules, contract wording or specialist compliance checks. Some formal deadlines treat weekends, bank holidays, time of day and service rules differently.
The tools use plain dates rather than time zones. That keeps everyday planning simple, but it means they are not designed for international time-zone conversion, daylight-saving edge cases or timestamp-based systems. For those situations, use the exact rules or software required by the organisation involved.
Date and time examples
Common planning checks| Question | Use this mode | Check carefully |
|---|---|---|
| What date is 14 calendar days after a start date? | Add days to a date | Calendar days count weekends and bank holidays. |
| How many working days are between two dates? | Estimate working days | Choose the UK nation and add any office closure dates. |
| When is a 5 business-day deadline? | Deadline calculator | Formal deadlines may use special service or cut-off rules. |
| How old is someone on a specific date? | Age and time since | The result uses whole calendar years, then months and days. |
| How many hours are in 3 days? | Convert time spans | Months and years use average lengths for rough planning. |
Assumptions and source notes
Estimate onlyBank holidays
The built-in calendars cover England & Wales, Scotland and Northern Ireland for the listed years in the tool. One-off holidays can change planning dates, so check the official list for formal use.
Deadlines
Deadline results are planning estimates. Legal, payroll, contract and compliance rules may treat weekends, bank holidays, service dates and time of day differently.
Source note: UK bank holiday dates reviewed against GOV.UK bank holidays and the GOV.UK bank holidays JSON feed. Last reviewed 19 July 2026.
Contains public sector information from GOV.UK licensed under the Open Government Licence v3.0.
Common date-planning mistakes
Sense-checksCalendar days vs working days
Calendar days count every date. Working days usually skip weekends and, when selected, bank holidays.
Inclusive vs exclusive ranges
Including both dates adds a day compared with elapsed-day counting. Pick the option that matches the rule you are applying.
Month-end dates
Adding one month to the 31st can be ambiguous because not every month has 31 days. Use the month-end rule that matches your situation.
Date and time FAQs
Quick answersCan I add or subtract days from a date?
Yes. Choose Add days, enter a start date and a number, then choose whether to add or subtract calendar days, weekdays, business days, weeks or months.
How are working days estimated?
Working days are estimated by counting Monday to Friday and subtracting the selected UK bank holidays plus any custom non-working days you enter.
Does this handle time zones?
No. These tools use plain calendar dates and simple durations for planning. They are not a time-zone, payroll or legal deadline calculator.
Are bank holiday dates always current?
The built-in UK bank holiday dates are reviewed against GOV.UK, but bank holidays can change or special holidays can be added. Check GOV.UK or the relevant organisation for formal planning.
Should I use this for legal or contract deadlines?
Use it as a planning estimate only. Legal, court, payroll, contract and compliance deadlines can have special counting rules, cut-off times, service rules and holiday handling.