September 2026 started on a Tuesday and ends on a Wednesday. It has 30 days, 22 weekdays and 21 working days after US federal holidays, across ISO weeks 36–40. Today is Tuesday, September 29, 2026, with 1 day left in the month.
Holiday dates follow each holiday's official rule (federal holidays under 5 U.S.C. 6103, with weekend dates observed on the nearest weekday). See our sources.
Labor Day (Monday, Sep 7); Rosh Hashanah (Friday, Sep 11); Grandparents Day (Sunday, Sep 13); Yom Kippur (Sunday, Sep 20); Fall (Tuesday, Sep 22).
How many working days are in September 2026?
September 2026 has 22 weekdays (Monday to Friday). Taking out the US federal holidays observed on weekdays leaves 21 working days. Company and state holidays can lower that further.
What day of the week does September 2026 start on?
September 2026 started on Tuesday, September 1, 2026 and ended on Wednesday, September 30, 2026.
Which week numbers are in September 2026?
September 2026 runs from ISO week 36 to week 40. ISO weeks start on Monday, and week 1 is the week with the year's first Thursday.
