Recognised as Month
September 2025
- September 2025
- 30 days
- 22 working days
- Q3
September 2025 had 30 days, beginning on a Monday and ending on a Tuesday. It contained 22 working days and 8 weekend days, spanning ISO weeks 36 to 40, and fell in Q3 of 2025.
The month
MoTuWeThFrSaSu
1234567
891011121314
15161718192021
22232425262728
2930
September 2025, weeks starting Monday. Weekends highlighted.
Month number9 of 12
Days30
First dayMonday, 1 September 2025
Last dayTuesday, 30 September 2025
QuarterQ3
Days before it in the year243
Day-of-year range244 to 273
Share of the year8.219%≈
Weeks and working days
Working days22Monday to Friday, ignoring public holidays, which vary by country and change
Weekend days8
ISO weeks spannedWeeks 36 to 40
Full weeks4and 2 days over
Sundays4
Mondays5
Tuesdays5
Wednesdays4
Thursdays4
Fridays4
Saturdays4
Position in the year
Reference numbers
Unix timestamp of the 1st1,756,684,800midnight UTC
Unix timestamp of the last day1,759,190,400midnight UTC
Seconds in the month2,592,000ignoring leap seconds
Julian Day Number of the 1st2,460,920
Hebrew8 Elul 5785the 1st of this month in the Hebrew calendar
Islamic (tabular)8 Rabi I 1447 AHthe tabular reckoning, not the observational calendar in religious use
Relative to today
These values depend on today’s date and change daily.
Keep nerding
Every link below is a page Nerdulator can generate from what it already knows about this value.
Adjacent months
September in other years
Days of the month
Nerdulate something else
Nothing in mind? Surprise me · today’s page