Business Days in December 2027 for Ireland
December 2027 has 21 working days under the Irish public holiday calendar. December 2027 contains 2 Irish public holidays on weekdays. The month covers 31 calendar days, of which 8 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
8
public holidays
2
Work Weeks
4.2
| Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|
1 | 2 | 3 | 4 wknd | 5 wknd | ||
6 | 7 | 8 | 9 | 10 | 11 wknd | 12 wknd |
13 | 14 | 15 | 16 | 17 | 18 wknd | 19 wknd |
20 | 21 | 22 | 23 | 24 | 25 wknd | 26 wknd |
27 Christmas Day (observed) | 28 St Stephen's Day (observed) | 29 | 30 | 31 |
public holidays in December 2027
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 2027. Useful for shift scheduling, weekly recurring billing, and any rota that depends on a specific day of the week landing in-month.
| Day | Count |
|---|---|
| Monday | 4 |
| Tuesday | 4 |
| Wednesday | 5 |
| Thursday | 5 |
| Friday | 5 |
| Saturday | 4 |
| Sunday | 4 |
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 2027 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 2027.
| Country | Business Days | Holidays this month |
|---|---|---|
| 🇺🇸United States | 21 | Christmas Day (observed), New Year's Day 2028 (observed) |
| 🇬🇧United Kingdom | 21 | Christmas Day (observed), Boxing Day (observed) |
| 🇨🇦Canada | 21 | Christmas Day (observed), Boxing Day (observed) |
| 🇦🇺Australia | 21 | Christmas Day (observed), Boxing Day (observed) |
| 🇮🇳India | 23 | None |
| 🇵🇭Philippines | 20 | Feast of the Immaculate Conception, Rizal Day, New Year's Eve |
| 🇫🇷France | 23 | None |
| 🇩🇪Germany | 23 | None |
| 🇯🇵Japan | 23 | None |
| 🇲🇽Mexico | 23 | None |
| 🇸🇬Singapore | 23 | None |
How December 2027 compares year over year
December 2026 also had 21 working days, so the working capacity is unchanged year over year. On the surrounding months, November 2027 has 22 working days and January 2028 has 20. Looking forward, December 2028 has 19 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 2027 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.