Ireland Working Days Calculator
Count working days between any two dates using Ireland's public holiday calendar. Ireland observes 10 public holidays including St. Patrick's Day, St. Brigid's Day (a new holiday since 2023), and four floating bank holidays whose dates change each year. Irish working day rules differ from both UK and continental EU practice — the Republic of Ireland and Northern Ireland also have separate holiday calendars.
Ireland Working Days Calculator
Covers Ireland's 10 public holidays for 2025. Several Irish bank holidays fall on the first or last Monday of a given month (floating dates that change each year). St. Brigid's Day was added as a new public holiday from 2023. Note that Northern Ireland has a different holiday calendar from the Republic of Ireland.
Formula
Working Days = Weekdays − Public holidays falling on weekdays
Count all Monday–Friday days in the range, then subtract any Irish public holidays that fall on those weekdays. Several Irish holidays are floating (first or last Monday of the month) — the 2025 dates are included here.
Worked Example
Scenario: A Dublin tech company agrees a 20 working day delivery milestone starting Monday 10 March 2025.
St. Patrick's Day (17 March) falls on a Monday — a weekday — and counts as one excluded holiday.
20 working days + 1 public holiday = 21 weekdays forward
Result: deadline falls on ~8 April 2025
St. Patrick's Day is a national holiday that also closes Irish banks and many UK offices with Irish operations. Plan international handoffs around this date.
Common Mistakes
- Confusing Republic of Ireland with Northern Ireland holidays. Northern Ireland is part of the UK and observes UK bank holidays, including 12 July (Orangemen's Day in some areas). The Republic observes St. Patrick's Day, Easter Monday, and October Bank Holiday that Northern Ireland does not share in the same way.
- Missing floating bank holidays. Ireland has four floating bank holidays tied to the first or last Monday of specific months (May, June, August, October). These dates shift each year. Always use the current year's actual dates.
- Overlooking St. Brigid's Day. St. Brigid's Day (first Monday of February) was introduced as a new Irish public holiday in 2023. It may not appear on older holiday lists or templates.
How to Use
- 1
Enter start and end dates
Select the period you want to measure. Both dates are inclusive.
- 2
Click Calculate
The tool counts Monday–Friday days and deducts Ireland's public holidays for 2025.
- 3
Review excluded holidays
The result names any public holidays excluded within the date range.
- 4
Cross-check for Northern Ireland
If your counterpart is in Northern Ireland, use UK bank holiday dates instead — they differ from the Republic's.
Frequently Asked Questions
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