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253 business days
2027 is a 365-day year in Ireland with 261 weekdays (Mondays to Fridays). After removing 10 national public holiday dates, 253 working days remain. The fullest month is December with 23 business days; the leanest is February with 19. If regional and sector-specific holidays are also excluded, the total falls to 253.
| Month | Calendar days | Business days | Holidays deducted |
|---|---|---|---|
| January 2027 | 31 | 20 | 1 |
| February 2027 | 28 | 19 | 1 |
| March 2027 | 31 | 21 | 2 |
| April 2027 | 30 | 22 | 0 |
| May 2027 | 31 | 20 | 1 |
| June 2027 | 30 | 21 | 1 |
| July 2027 | 31 | 22 | 0 |
| August 2027 | 31 | 21 | 1 |
| September 2027 | 30 | 22 | 0 |
| October 2027 | 31 | 20 | 1 |
| November 2027 | 30 | 22 | 0 |
| December 2027 | 31 | 23 | 2 |
| Date | Day | Holiday | Deducted from working days |
|---|---|---|---|
| 2027-01-01 | Friday | Lá Caille | Yes |
| 2027-02-01 | Monday | Lá Fhéile Bríde | Yes |
| 2027-03-17 | Wednesday | Lá Fhéile Pádraig | Yes |
| 2027-03-29 | Monday | Luan Cásca | Yes |
| 2027-05-03 | Monday | Lá Bealtaine | Yes |
| 2027-06-07 | Monday | Lá Saoire i mí an Mheithimh | Yes |
| 2027-08-02 | Monday | Lá Saoire i mí Lúnasa | Yes |
| 2027-10-25 | Monday | Lá Saoire i mí Dheireadh Fómhair | Yes |
| 2027-12-25 | Saturday | Lá Nollag | Yes |
| 2027-12-26 | Sunday | Lá Fhéile Stiofáin | Yes |