There are 22 working days in September 2027. That is every Monday to Friday in the month — 22 weekdays out of 30 days, with 8 weekend days. September 2027 starts on a Wednesday and ends on a Thursday. This page gives the exact count, the day-by-day calendar, and how the count is worked out.
Try the tool: Days Between Dates Calculator — count the working days for any month or date range, with your own holidays added.
How many working days in September 2027?
| Count | Value |
|---|---|
| Total days in the month | 30 |
| Weekdays (Monday–Friday) | 22 |
| Weekend days (Saturday–Sunday) | 8 |
| Working days | 22 |
Working days are the weekdays: Monday to Friday, excluding Saturday and Sunday. Public holidays are not subtracted here — a public holiday that falls on a weekday is still a working day by this definition, unless your employer treats it as a day off. If you need the count excluding holidays, that is the business day count: see business days in september 2027, which is 21.
Day-by-day calendar — September 2027
| Date | Day of the week | Working day? |
|---|---|---|
| 1 September 2027 | Wednesday | Yes |
| 2 September 2027 | Thursday | Yes |
| 3 September 2027 | Friday | Yes |
| 4 September 2027 | Saturday | No — weekend |
| 5 September 2027 | Sunday | No — weekend |
| 6 September 2027 | Monday | Yes |
| 7 September 2027 | Tuesday | Yes |
| 8 September 2027 | Wednesday | Yes |
| 9 September 2027 | Thursday | Yes |
| 10 September 2027 | Friday | Yes |
| 11 September 2027 | Saturday | No — weekend |
| 12 September 2027 | Sunday | No — weekend |
| 13 September 2027 | Monday | Yes |
| 14 September 2027 | Tuesday | Yes |
| 15 September 2027 | Wednesday | Yes |
| 16 September 2027 | Thursday | Yes |
| 17 September 2027 | Friday | Yes |
| 18 September 2027 | Saturday | No — weekend |
| 19 September 2027 | Sunday | No — weekend |
| 20 September 2027 | Monday | Yes |
| 21 September 2027 | Tuesday | Yes |
| 22 September 2027 | Wednesday | Yes |
| 23 September 2027 | Thursday | Yes |
| 24 September 2027 | Friday | Yes |
| 25 September 2027 | Saturday | No — weekend |
| 26 September 2027 | Sunday | No — weekend |
| 27 September 2027 | Monday | Yes |
| 28 September 2027 | Tuesday | Yes |
| 29 September 2027 | Wednesday | Yes |
| 30 September 2027 | Thursday | Yes |
Working weeks in September 2027
The working weeks of the month — Monday to Friday, with the business days in each week:
| Week starting | Days | Business days |
|---|---|---|
| 30 August 2027 | 1 September 2027 – 3 September 2027 | 3 |
| 6 September 2027 | 6 September 2027 – 10 September 2027 | 5 |
| 13 September 2027 | 13 September 2027 – 17 September 2027 | 5 |
| 20 September 2027 | 20 September 2027 – 24 September 2027 | 5 |
| 27 September 2027 | 27 September 2027 – 30 September 2027 | 4 |
How the count is worked out
Step one: count the days in the month — 30 for September 2027. Step two: count the weekends. September 2027 starts on a Wednesday, so the Saturdays and Sundays fall on the dates shown in the table — 8 weekend days in total, leaving 22 weekdays. Step three: there is none — working days are the weekdays, so the answer is 22. The days between dates calculator does the same calculation for any date range, and the date calculator works out what date it is a number of days from now.
September in other years in other years
The same month in the adjacent years, for comparison — the number changes because the calendar shifts by one day each year (two after a leap year), so the same month starts on a different weekday.
| Year | Total days | Weekdays | Weekends | Business days |
|---|---|---|---|---|
| 2026 | 30 | 22 | 8 | 21 |
| 2027 | 30 | 22 | 8 | 21 |
| 2028 | 30 | 21 | 9 | 20 |
September 2027 in the year
September is the 9th month of 2027 — the 3rd quarter of the year (Q3). There are 243 days in the year before September begins, and 92 days left in the year after it ends. In the Northern Hemisphere it is autumn; in the Southern Hemisphere the seasons are reversed. 2027 is not a leap year, with 365 days.
The federal holidays still to come after September 2027 are Columbus Day (11 October 2027), Veterans Day (11 November 2027), Thanksgiving Day (25 November 2027), Christmas Day (25 December 2027). If you are planning the rest of the year, those are the days to watch: each one that falls on a weekday costs a business day, and each one that falls near a weekend tends to become a long weekend. The days between dates calculator counts the days to any of them, and the holiday countdowns show the countdown to each one live.
Planning with September 2027
21 business days is 4 working weeks and 1 days. If you are planning a project, a deadline or a holiday, that is the capacity of the month: 21 days on which offices, banks and government departments are open. The weekends — 8 days — are the days off, and the federal holidays are the days to check before you promise a delivery date. For the same month next year, see working days in september 2028.
Frequently asked questions
How many working days are there in September 2027?
22 — 22 weekdays.
How many weekdays are in September 2027?
22 weekdays and 8 weekend days, out of 30 days in total.
What day of the week does September 2027 start on?
September 2027 starts on a Wednesday and ends on a Thursday.
How many working days are there in September 2028?
See working days in september 2028 for the exact count — it differs because the calendar shifts by a day each year.
How many hours are there in September 2027?
720 hours — 43200 minutes, or 2592000 seconds. That is the total for the whole month, including the nights and weekends; the working hours are 176 for a standard eight-hour day, or 168 if you count business days only.
How do you count business days?
Count the weekdays in the range and subtract the public holidays that fall on weekdays. The business days calculator does it for any range, with your own holidays added.
Sources
- IANA Time Zone Database, via Node.js Intl (
Intl.DateTimeFormatwithtimeZone) — offsets, daylight saving dates and local times in this article were worked out from the IANA database, not typed from memory. - TimeFlow's own time-zone data (
data/cities.ts,data/dst.ts), computed from the IANA database. - US federal holiday rules (5 U.S.C. § 6103): the holidays subtracted in the business day count are the eleven federal holidays, on the dates set by law.
- TimeFlow's business days calculator and days between dates calculator — the live tools behind the counts on this page.
- Time-zone and daylight saving rules are set by governments and can change. For flights, deadlines and meetings that cannot move, confirm the time with an official source.