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September 2028 calendar

30 days21 weekdaysStarts on FridayISO weeks 35–39

September 2028
WkMonTueWedThuFriSatSun
35
36
37
38
39

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September 2028 in numbers

Days
30
Weekdays (Mon–Fri)
21
Weekend days
9
First and last day
Friday – Saturday
First and last working day
Fri, Sep 1 – Fri, Sep 29
Week numbers
35–39
Day of the year
245–274
Quarter
Q3 2028
Islamic months (computed)
Rabi' al-Thani – Jumada al-Ula 1450 AH

With 30 days, September 2028 has four full weeks plus 2 extra days, so Friday and Saturday occur five times; every other weekday occurs four times. It has 9 weekend days and 21 weekdays.

September 1 is day 245 of the year, so September 2028 covers day numbers 245 to 274. In the Umm al-Qura Islamic calendar, 1 Jumada al-Ula 1450 AH falls on September 20 (computed; where months begin with the sighting of the new crescent, the start can differ by a day).

Public holidays in September 2028

DateHolidayWhere
Mon, Sep 4Labor DayUnited States (federal)
Mon, Sep 4Labour DayCanada (federal)
Mon, Sep 18Respect for the Aged DayJapan
Mon, Sep 25Show DayAustralia: Western Australia
Mon, Sep 25Heritage Day (substitute day)South Africa
Sat, Sep 30National Day for Truth and ReconciliationCanada (federal)

National holidays of the 17 sets we take from official government sources; see public holidays by country for regional days and sources. Where a holiday that falls on a weekend moves to a weekday, the table shows the day off.

Other dates in September 2028

Days that many people keep but that are not public holidays in our 17 sets, each from its fixed rule. Jewish dates begin at sunset the evening before; Islamic dates follow the Umm al-Qura calendar and are announced locally.

Clock changes and seasons

Clock changes from IANA tzdata as the rules stand today. Equinox and solstice times are the US Naval Observatory’s, in UTC.

Questions

How many weekdays are in September 2028?
21 weekdays (Monday to Friday) and 9 weekend days, out of 30 days. Public holidays are not subtracted, because they depend on the country; this month has 6 holiday dates in the countries we cover (see the table on this page).
What day does September 2028 start on?
September 2028 starts on Friday, September 1, 2028 and ends on Saturday, September 30, 2028. The first working day is Fri, Sep 1 and the last is Fri, Sep 29.
What week numbers are in September 2028?
Under ISO 8601 (weeks from Monday) September 2028 spans weeks 35–39. The week number page explains the rule.
What is the day number of September 1, 2028?
September 1 is day 245 of 2028 and September 30 is day 274. In the YYDDD format often called a Julian date, the month runs from 28245 to 28274.
What holidays are in September 2028?
Labor Day (Mon, Sep 4: United States (federal)); Labour Day (Mon, Sep 4: Canada (federal)); Respect for the Aged Day (Mon, Sep 18: Japan); Show Day (Mon, Sep 25: Australia: Western Australia); Heritage Day (substitute day) (Mon, Sep 25: South Africa); National Day for Truth and Reconciliation (Sat, Sep 30: Canada (federal)).

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