2028 has 366 days
2028 is a leap year, so February has 29 days and the year has 366. It starts on a Saturday and ends on a Sunday. Starting on a Saturday and ending on a Sunday means it contains 53 each of two weekdays and 52 of the rest — a leap year always does.
Of those 366 days, 260 fall on a weekday and 106 at a weekend. 10 of the eleven US federal holidays land on a weekday in 2028 — the rest fall at a weekend, where the federal observance shifts to the adjacent Friday or Monday and can even move into the neighbouring year — which leaves 250 business days.
The day count is the least interesting number about a year and the most asked for, usually as a step towards something else: a daily rate, an interest accrual, a percentage of the year elapsed, or the difference between "a year" and "365 days". Those last two are not the same thing. A span of 365 days starting after 28 February in a common year reaches the same date next year; a span that contains a 29 February does not, and lands a day early. If that distinction matters, count the dates rather than the days — the days between dates tool does it exactly.
2028 at a glance
| Days | 366 |
|---|---|
| Leap year | Yes |
| Starts / ends on | Saturday / Sunday |
| Weekdays | 260 |
| Weekend days | 106 |
| US federal holidays on a weekday | 10 |
| Business days | 250 |
| ISO 8601 weeks | 52 |
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 the ISO 8601 week rule and the leap-year rule in full.