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Dates & time · Free online tool
Deadline calculator
Add or subtract calendar or working days with explicit UK bank-holiday or custom closure dates.
3 guest runs per rolling 24 hours10 with a free accountPrivate inputsMobile-friendly
Deadline calculator workspace
Runs locally in your browser
Official UK bank holiday presets · 2025–2028
Dates come from GOV.UK. Applying a preset replaces the holiday box; you can then edit it for organisation closures or rules. No national calendar is applied unless you choose one. Inspect or download the maintained regional dataset.
Result
Deadline—
Weekday—
Calendar time elapsed—
Deadline summary
Use it with confidence
How to use the deadline calculator.
Calculate and review
Use the main action when needed. Calendar mode shifts the date directly; working-day mode advances one day at a time and ignores the selected weekends and holiday dates.
Try a worked example
Add ten working days while skipping the chosen weekend pattern and the explicitly selected UK regional bank holidays.
Check the assumptions
Choose the relevant national calendar explicitly, add organisation closures separately and verify any contract, court or service-specific counting rule.
A clearer answer
What date is a set number of working days away?
Choose whether to add or subtract days, define the weekend pattern, explicitly apply the relevant official UK bank-holiday preset or enter custom closure dates, and decide whether an eligible starting date counts as day one. The result shows both the deadline and elapsed calendar time.
See the useful decision, not only one number.
The calculator makes the normally hidden counting rules visible. It supports different weekend patterns, maintained GOV.UK presets for all three UK divisions and editable custom dates instead of silently assuming that every deadline follows one calendar.
Worked example: a bank holiday changes 10 working days
Start on Friday 21 August 2026, add 10 days, exclude Saturday and Sunday, apply the England and Wales preset and leave the start date uncounted. The result is Monday 7 September 2026 because the Summer bank holiday on Monday 31 August is excluded. Without that holiday date, the result would be Friday 4 September.
Method: Move one date at a time, count only dates that are not selected weekend days or supplied holidays, and stop at the requested count.
Common mistakes to avoid.
- Mixing calendar and working days
- Counting the starting date without checking the rule
- Assuming all UK nations share the same bank holidays
- Forgetting organisation closures or contract-specific definitions
Use the result with the right assumptions.
England and Wales, Scotland and Northern Ireland publish different bank-holiday calendars. The current GOV.UK presets cover 2025–2028; the wording of a contract, court rule or service policy still takes priority over a general calculator.
Checked sources
Official guidance behind this tool.
UK bank holidays
Official bank-holiday dates differ across England and Wales, Scotland and Northern Ireland. The explicit 2025–2028 presets load the selected GOV.UK division and remain editable for organisation closures.
Reference checked 29 July 2026. The source takes priority if guidance changes.
Helpful answers
Deadline calculator FAQs.
Is the deadline calculator free?
Yes. Guests receive 3 runs per rolling 24 hours, verified free accounts receive 10, and Premium subscribers receive unlimited normal use.
Does UtilHub upload or save my inputs?
No. This tool runs in your browser and UtilHub does not receive or store the values you enter. Your browser or device may still retain normal local history or form data.
How does this deadline calculator work?
Calendar mode shifts the date directly; working-day mode advances one day at a time and ignores the selected weekends and holiday dates.
What should I check before using the result?
Choose the relevant national calendar explicitly, add organisation closures separately and verify any contract, court or service-specific counting rule.
Does the deadline calculator include UK bank holidays automatically?
Only after you explicitly choose England and Wales, Scotland or Northern Ireland. The selected GOV.UK 2025–2028 dates replace the editable holiday field, so the tool never silently applies the wrong national calendar and you can still add organisation closures.
Does the starting date count as day one?
Only when you select the option to count the start date and that date is eligible under the weekend and holiday rules. Otherwise counting begins with the next eligible date.