Days until St. Patrick’s Day
St. Patrick’s Day 2027 is on Wednesday, March 17, 2027. The count starts from today’s date; pick another date to count from it instead.
- Days until St. Patrick’s Day
- 169
From September 29, 2026, there are 169 days until St. Patrick’s Day on Wednesday, March 17, 2027.
- Date
- Wednesday, March 17, 2027
- Day of the week
- Wednesday
- In weeks
- 24 weeks and 1 day
Answer for the example date Tuesday, September 29, 2026. It changes to today's date when the page loads.
Days until St. Patrick’s Day: 169. From September 29, 2026, there are 169 days until St. Patrick’s Day on Wednesday, March 17, 2027.
Where is St. Patrick’s Day on the calendar?
How to calculate
Counts the days from today, or any date you choose, to the next St. Patrick’s Day, with its date and day of the week.
Example with the default inputs (Count from September 29, 2026) on the example date Tuesday, September 29, 2026: From September 29, 2026, there are 169 days until St. Patrick’s Day on Wednesday, March 17, 2027.
Method: Find the first date of St. Patrick’s Day on or after the start date, then count the days from the start date to it.
- St. Patrick’s Day is March 17 every year.
- Start dates from January 1, 1900 to December 31, 2400 work, because the date field accepts that range.
- The start date itself is not counted: from the day before, the count is 1; on the day itself, it is 0.
- Dates are calendar days with no time of day, so a time zone or a daylight-saving change never adds or loses a day.
Worked examples
Each example is checked against the calculator on every build.
- Count from 2026-01-01 gives Date 2026-03-17, Days until St. Patrick’s Day 75.Source: the rule written again in Python 3 (datetime); docs/progress/WP-43.md
- Count from 2026-03-18 gives Date 2027-03-17, Days until St. Patrick’s Day 364.Source: the rule written again in Python 3 (datetime); docs/progress/WP-43.md
Other questions people ask
When is St. Patrick’s Day 2027?
St. Patrick’s Day 2027 is on Wednesday, March 17, 2027.
When is St. Patrick’s Day 2028?
St. Patrick’s Day 2028 is on Friday, March 17, 2028.
How is the date of St. Patrick’s Day set?
St. Patrick’s Day is March 17 every year. Source: the rule written again in Python 3 (datetime).
How are the days until St. Patrick’s Day counted?
From the start date (today, unless you change it) to the date, without counting the start date. The day before, the count is 1; on the day itself, it is 0; the day after, the count moves on to the next St. Patrick’s Day.