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Business Day Calculator

Business Days in December 2023 for Ireland

December 2023 has 21 working days under the Irish public holiday calendar. December 2023 contains no Irish public holidays on a weekday. The month covers 31 calendar days, of which 10 are Saturday and Sunday. That count drives invoice cycles, payroll runs, and any contract that defines deadlines as a number of working days in Ireland.

working days

21

Calendar Days

31

Weekend Days

10

public holidays

0

Work Weeks

4.2

December 2023 business day calendar
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public holidays in December 2023

No Irish public holidays fall on a weekday in December 2023, so banks and Ireland financial markets keep their regular schedule for the entire month.

Ireland December deadlines

December closes the calendar year for finance teams. VAT3 for October-November bimonthly is due December 19 or December 23 via ROS. Form CT1 for March year-end companies is due December 23. Christmas Day (December 25) and St Stephen's Day (December 26) close banks, Euronext Dublin, and TARGET2-IE Euro-clearing. Year-end accruals, debtor circularisations, and audit-firm scoping fill the second half of the month.

Day-of-Week Distribution

The count of each weekday in December 2023. Useful for shift scheduling, weekly recurring billing, and any rota that depends on a specific day of the week landing in-month.

DayCount
Monday4
Tuesday4
Wednesday4
Thursday4
Friday5
Saturday5
Sunday5

Ireland reporting cycles and business-day rules

Irish business-day cycles align with Revenue's VAT3 bimonthly cutoffs (paper on the 19th, ROS extended to the 23rd) and PAYE monthly remittance on the 14th of the following month for most employers, with the PAYE Modernisation system reporting in real time on each pay event. The Central Bank of Ireland operates TARGET2-IE for euro wholesale settlement on TARGET2 business days, which exclude bank holidays. Form CT1 corporation tax is due nine months after the company year-end. The European Communities (Late Payment in Commercial Transactions) Regulations 2012 set 8% above the ECB main refinancing rate as the statutory late-payment interest rate, payable from day 31 after invoice for B2B transactions.

December 2023 working days compared by country

Working-day counts vary across countries because each country observes its own public holidays. The table below puts Ireland alongside the other ten supported holiday calendars for December 2023.

How December 2023 compares year over year

December 2022 had 22 working days, so December 2023 has 1 fewer working day year over year. On the surrounding months, November 2023 has 22 working days and January 2024 has 22. Looking forward, December 2024 has 20 working days under the same Irish public holiday calendar.

Using this calculator in Ireland

A Dublin treasury operator at an international tech HQ uses the 21-day December 2023 count to align SEPA Credit Transfer cycles with Central Bank of Ireland TARGET2-IE clearing and prompt-pay windows under the European Communities (Late Payment in Commercial Transactions) Regulations 2012. A Cork law-firm cashier uses business-day math to track Workplace Relations Commission complaint windows under the Workplace Relations Act 2015. A Galway SaaS controller uses the count to align Revenue VAT3 bimonthly returns and ROS Form CT1 nine-month corporation-tax filings against month-end cutoffs.

For informational purposes only

This calculator provides general estimates based on business day counting rules. It does not constitute legal advice. Deadlines in legal, regulatory, or contractual matters may be subject to jurisdiction-specific rules, court orders, or statutory exceptions. Always verify critical deadlines with a qualified professional.

Frequently Asked Questions

How many business days are in December 2023 for Irish public?
December 2023 has 21 working days under the Irish public holiday calendar. The month spans 31 calendar days, of which 10 fall on a weekend and 0 are Irish public holidays that lands on a weekday. The remaining 21 weekdays are countable as working days for invoicing, deadline tracking, and contract math.
Which Ireland holidays affect December 2023?
December 2023 contains no Irish public holidays that fall on a weekday. Banks, the central clearing system, and Ireland financial markets keep their normal schedule throughout the month under this calculator's national-only holiday set.
Why is St Brigid's Day included from 2023 onward?
The Sick Leave Act 2022 added St Brigid's Day (Lá Fhéile Bríde) as Ireland's tenth public holiday under the Organisation of Working Time Act 1997. From 2023 the day is the first Monday in February, except when February 1 itself falls on a Friday, in which case February 1 is the public holiday. The holiday recognises both St Brigid and the start of the Celtic festival of Imbolc, and was the first new Irish public holiday added since 1973.
How do observed-day shifts work for Irish public holidays?
When New Year's Day, St Patrick's Day, Christmas Day, or St Stephen's Day falls on a weekend, the observance shifts to the next working day under the Organisation of Working Time Act 1997. Employers grant either a paid day off, an extra day of annual leave, an extra day of pay, or pay for the day as normal. Easter Monday and the four bank holidays on the first or last Mondays (May, June, August, October) always fall on a Monday by definition and therefore have no observance shift.
Why does the business-day count vary year to year?
Two things shift the monthly count for Ireland. First, the day of the week the first of the month lands on changes the count of each weekday. Second, Irish public holidays anchored to a fixed date shift their weekday across years. Some years a fixed-date holiday lands on a weekend; some countries shift the observance to an adjacent weekday and some absorb it into the weekend. December 2022 had 22 working days, so December 2023 has 1 fewer working day year over year.

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