New Year's Eve 2029 is Monday, 31 December 2029
There are 1,230 days between 19 August 2026 and New Year's Eve 2029, which falls on Monday, 31 December 2029. That is 175 weeks and 5 days, or 840 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 2029-12-31 in ISO form and 12/31/2029 in the US format, it falls in ISO week 1 of 2030, and it is day 365 of 365.
How the date of New Year's Eve is decided
New Year's Eve is always 31 December.
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 2029 it is a Monday.
New Year's Eve 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.
New Year's Eve in the years after 2029
| Year | Date | Day | Countdown |
|---|---|---|---|
| 2030 | 31 December 2030 | Tuesday | — |
| 2031 | 31 December 2031 | Wednesday | — |
| 2032 | 31 December 2032 | Friday | — |
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 840 working days above.