Why does the converted date sometimes change?

The converted date can change when the destination time zone is many hours ahead or behind the source time zone.

Is London always the same as UTC?

No. London is usually on GMT in winter and BST in summer, so the selected date matters.

Can I use this converter for meetings?

Yes, it is useful for common meeting planning, but critical travel, employment or legal deadlines should be checked against the official source as well.

How to Count Working Days in the UK Guide

Use the How to Count Working Days in The UK

To count working days in the UK, start with the date range, remove weekends, then remove any relevant UK bank holidays for the correct region. For many everyday calculations, that means counting Monday to Friday only, excluding public holidays where the rule says they do not count.

The basic method

Count every weekday in the period, then subtract bank holidays that fall on weekdays in the selected UK region. Always check whether the start date and end date should be included.

The hard part is not the maths. It is knowing the rule you are following. Employment contracts, delivery terms, legal deadlines and workplace policies can count days differently.

Need the exact count?

Use the calculator to count working days between two dates, with weekends and UK bank-holiday regions handled for you.

Use working days calculator

How to count working days step by step

Choose your start date and end date. Write the actual dates down rather than relying on a vague phrase like “next week”.
Decide whether the start date counts. Some rules start counting from the same day; others start from the next day.
Remove weekends. For a standard UK office pattern, Saturday and Sunday are not working days.
Remove relevant bank holidays. Use the correct calendar for England and Wales, Scotland or Northern Ireland.
Check the wording. A rule saying “10 working days” may behave differently from “within 10 calendar days”.

For a simple date range, the days between dates calculator can show total calendar days. For work-style deadlines, use the working days calculator.

Do weekends count as working days?

Usually no, if the rule assumes a standard Monday-to-Friday working week. In that case, Saturday and Sunday are calendar days but not working days.

However, not everyone works Monday to Friday. Retail, healthcare, hospitality, transport, shift work and rota-based roles can have different working patterns. If the calculation affects your pay, contract, holiday, resignation or legal deadline, check the actual rule rather than assuming weekends never count.

Standard office assumptionMonday to Friday count; Saturday and Sunday do not.

Shift workYour own rota may not match a standard working-day calculator.

Calendar-day deadlineWeekends still count if the rule says calendar days.

Contract wordingEmployment wording can override a generic calculator assumption.

How UK bank holidays affect working-day counts

UK bank holidays are not the same across every part of the UK. England and Wales, Scotland and Northern Ireland have separate bank-holiday calendars. That is why a UK working-days calculation should ask for a region.

GOV.UK also explains that if a bank holiday falls on a weekend, a substitute weekday normally becomes the bank holiday. That substitute day can affect a working-day calculation if the rule excludes bank holidays.

Important: Do not assume “UK bank holiday” means one identical calendar for the whole UK. Scotland and Northern Ireland include some different dates from England and Wales.

Region	Why it matters	Calculator setting
England & Wales	Common default for many UK workplace and admin examples.	Select England & Wales bank holidays.
Scotland	Different public holidays can change the number of working days.	Select Scotland bank holidays.
Northern Ireland	Additional regional holidays can affect deadlines and work planning.	Select Northern Ireland bank holidays.
No bank holidays	Useful if the rule only excludes weekends, not public holidays.	Select “none” or leave bank holidays out.

Should you include the start date?

This is one of the easiest ways to get a deadline wrong. The same two dates can produce a different result depending on whether the start date is counted.

Exclude start date: counting begins the day after the start date. This is common for “days between” style calculations.
Include start date: the start date counts as day one. Some workplace, booking or internal admin rules may work this way.
Include end date: the final date is counted as part of the period. This is sometimes used for date ranges and records.

Simple example

Monday to Friday can be 4 days if you count the gap between dates, or 5 days if you include both Monday and Friday.

Worked example: counting 10 working days

Suppose a task starts on Monday and is due after 10 working days, using a standard Monday-to-Friday working week and no bank holidays.

Day	Does it count?	Running total
Monday	Yes, if the start date is included	1
Tuesday to Friday	Yes	5 by Friday
Saturday and Sunday	No	Still 5
Following Monday to Friday	Yes	10 by the next Friday

If a bank holiday falls inside the period and the rule excludes bank holidays, the end date moves later. If the start date does not count, the end date may also move later.

Common UK uses for working-day counts

Work deadlinesUseful for HR, admin, payroll and internal response times.

Notice periodsOnly use as an estimate; contracts and Acas guidance matter.

Deliveries and servicesMany businesses quote turnaround times in working days.

Project planningWorking days can give a more realistic timeline than calendar days.

For notice calculations, use the notice period end date calculator, but check your employment contract, written statement or HR guidance before relying on the result.

Common mistakes to avoid

Using calendar days when the rule says working days. This can make a deadline look earlier than it really is.
Forgetting bank holidays. A single bank holiday can shift the result.
Choosing the wrong UK region. Scotland and Northern Ireland do not always match England and Wales.
Assuming the start date counts. Always check whether the count starts today or tomorrow.
Ignoring contract wording. For employment dates, the contract or written statement is usually more important than a generic calculator.

Best practice: if the date matters legally, financially or contractually, confirm the final date in writing with the relevant person or organisation.

Working days FAQs

What is a working day in the UK?

A working day is usually a day when normal work or business is carried out. For many calculations this means Monday to Friday, excluding weekends and sometimes excluding bank holidays.

Are bank holidays working days?

Often not, but it depends on the rule you are following. Some deadlines exclude bank holidays, while others count all calendar days.

Do working days include the start date?

Not always. Some calculations count from the same day, while others start from the next day. Check the wording carefully.

Is Saturday a working day?

For a standard Monday-to-Friday calculation, no. But some workplaces and industries treat Saturday as a normal working day.

Can I use working days for notice periods?

You can use them for an estimate if your notice period is expressed in working days, but employment notice depends on your contract, written statement and circumstances.

Sources used

GOV.UK bank holidays — UK bank-holiday calendars and substitute-day wording.
Acas notice periods — employment notice-period caveats and contract context.

How to count working days in the UK