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DateAlmanac

September 2026

  • 30 days
  • Starts Tuesday
  • Ends Wednesday
  • 21 working days
  • 8 weekend days
  • ISO weeks 36–40
Calendar grid for 9/2026, weeks starting Sun
ISO week number, Monday to Sunday
36
37
38
39
40

Holiday or observanceWeekend

Holidays in September

  • Labor DaySep 7
  • Patriot DaySep 11
  • National Grandparents DaySep 13

Federal holidays from 5 U.S.C. §6103, plus widely kept US observances. 4 religious dates fall in September 2026 as well — see the calendar with every holiday.

Moon phases

  • Last quarter

    Fri, Sep 4

    3:51 AM ET

  • New moon

    Thu, Sep 10

    11:26 PM ET

  • First quarter

    Fri, Sep 18

    4:43 PM ET

  • Full moon

    Sat, Sep 26

    12:48 PM ET

Times in US Eastern. Computed from Meeus, Astronomical Algorithms, ch. 49.

The moon through September

  1. 1
  2. 3
  3. 5
  4. 7
  5. 9
  6. 11
  7. 13
  8. 15
  9. 17
  10. 19
  11. 21
  12. 23
  13. 25
  14. 27
  15. 29
  16. 30
The moon every other evening, drawn at its true illumination. The terminator is a semi-ellipse, not a straight edge — it only looks straight at the quarters.

About September 2026

September 2026 has 30 days. It begins on a Tuesday and ends on a Wednesday, which gives the month five Tuesdays and Wednesdays — and only four of every other weekday. Of its 22 weekdays, 1 is a federal holiday, leaving 21 working days.

The September equinox falls on Tuesday, September 22, 2026, the 22nd of the month.

2026 at a glance

Calendar with holidaysPrintable versionDownload PDFFull year 2026