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DateAlmanac

September 2027

  • 30 days
  • Starts Wednesday
  • Ends Thursday
  • 21 working days
  • 8 weekend days
  • ISO weeks 35–39
Calendar grid for 9/2027, weeks starting Sun
ISO week number, Monday to Sunday
35
36
37
38
39

Holiday or observanceWeekend

Holidays in September

  • Labor DaySep 6
  • Patriot DaySep 11
  • National Grandparents DaySep 12

Federal holidays from 5 U.S.C. §6103, plus widely kept US observances. 1 religious date falls in September 2027 as well — see the calendar with every holiday.

Moon phases

  • First quarter

    Tue, Sep 7

    2:31 PM ET

  • Full moon

    Wed, Sep 15

    7:03 PM ET

  • Last quarter

    Thu, Sep 23

    6:20 AM ET

  • New moon

    Wed, Sep 29

    10:36 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 2027

September 2027 has 30 days. It begins on a Wednesday and ends on a Thursday, which gives the month five Wednesdays and Thursdays — 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 Thursday, September 23, 2027, the 23rd of the month.

2027 at a glance

Calendar with holidaysPrintable versionDownload PDFFull year 2027