St Patrick's Day 2027 is Wednesday, 17 March 2027
There are 210 days between 19 August 2026 and St Patrick's Day 2027, which falls on Wednesday, 17 March 2027. That is exactly 30 weeks, or 142 working days once Saturdays, Sundays and the US federal holidays in between are taken out — the figure that matters if you are counting delivery lead time or a work schedule rather than sleeps. The date is 2027-03-17 in ISO form and 3/17/2027 in the US format, it falls in ISO week 11 of 2027, and it is day 76 of 365.
How the date of St Patrick's Day is decided
St Patrick's Day is always 17 March. It is a public holiday in Ireland, where it moves to the following Monday when it falls on a weekend, but not in the United States.
That makes it a fixed date: the same day of the same month every year, so it lands on a different weekday each time. In 2027 it is a Wednesday.
St Patrick's Day is an observance rather than a federal holiday. Offices, banks and schools stay open unless an individual employer chooses otherwise, and it counts as an ordinary business day in every calculator here. Only the eleven federal holidays are treated as non-working days — the list and the reasoning are on the holiday sources page.
St Patrick's Day in the years after 2027
| Year | Date | Day | Countdown |
|---|---|---|---|
| 2028 | 17 March 2028 | Friday | St Patrick's Day 2028 |
| 2029 | 17 March 2029 | Saturday | St Patrick's Day 2029 |
| 2030 | 17 March 2030 | Sunday | — |
The date does not move, but the weekday does — which is why the same holiday gives a long weekend in some years and not others.
Every convention used above — whether the start date counts, how month ends are clamped, which holidays close an office — is written out on the methodology page, including how we count the 142 working days above.