Rosh Hashanah 2027 is Saturday, 2 October 2027
There are 409 days between 19 August 2026 and Rosh Hashanah 2027, which falls on Saturday, 2 October 2027. That is 58 weeks and 3 days, or 280 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 2027-10-02 in ISO form and 10/2/2027 in the US format, it falls in ISO week 39 of 2027, and it is day 275 of 365.
How the date of Rosh Hashanah is decided
Begins at sunset on the eve of 1 Tishrei, the Hebrew new year, falling in September or early October.
That makes it a computed date: there is no fixed day and no simple weekday rule, so it has to be worked out from a formula or a calendar of its own each year. In 2027 it works out as Saturday 2 October.
This date is an estimate, not a fixed point. Rosh Hashanah depends on observation rather than arithmetic, so the date announced locally can differ by a day from any date calculated in advance, and it can differ between countries in the same year. We show the arithmetic approximation and label it, rather than presenting it as settled. If the date matters — for travel, a booking or time off — confirm it with the community or authority you are following. How we produce these dates, and which of them are approximate, is set out on the holiday sources page.
Rosh Hashanah 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.
Rosh Hashanah in the years after 2027
| Year | Date | Day | Countdown |
|---|---|---|---|
| 2028 | 21 September 2028 | Thursday | Rosh Hashanah 2028 |
| 2029 | 10 September 2029 | Monday | Rosh Hashanah 2029 |
| 2030 | 28 September 2030 | Saturday | — |
Both the date and the weekday move, because the rule is not tied to either.
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 280 working days above.