Cinco de Mayo 2027 is Wednesday, 5 May 2027
There are 259 days between 19 August 2026 and Cinco de Mayo, which falls on Wednesday, 5 May 2027. That is exactly 37 weeks, or 177 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 2027-05-05 in ISO form and 5/5/2027 in the US format, it falls in ISO week 18 of 2027, and it is day 125 of 365.
How the date of Cinco de Mayo is decided
Cinco de Mayo is always 5 May.
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.
Cinco de Mayo 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.
Cinco de Mayo in the years after 2027
| Year | Date | Day | Countdown |
|---|---|---|---|
| 2028 | 5 May 2028 | Friday | Cinco de Mayo 2028 |
| 2029 | 5 May 2029 | Saturday | Cinco de Mayo 2029 |
| 2030 | 5 May 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 177 working days above.