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Is Monday 1 September 2025 a US federal holidays business day?

No: Monday 1 September 2025 is not a US federal holidays business day, because US federal holidays is closed for Labor Day, according to U.S. Office of Personnel Management; US federal holidays reopens on Tuesday 2 September 2025 (Zeitwide release 2026.11.04.1).

28 days of US federal holidays around Mon 1 Sept 2025

US federal holidays, Mon 25 Aug 2025 to Sun 21 Sept 2025
CalendarMon 25 Aug 2025Tue 26 Aug 2025Wed 27 Aug 2025Thu 28 Aug 2025Fri 29 Aug 2025Sat 30 Aug 2025Sun 31 Aug 2025Mon 1 Sept 2025Tue 2 Sept 2025Wed 3 Sept 2025Thu 4 Sept 2025Fri 5 Sept 2025Sat 6 Sept 2025Sun 7 Sept 2025Mon 8 Sept 2025Tue 9 Sept 2025Wed 10 Sept 2025Thu 11 Sept 2025Fri 12 Sept 2025Sat 13 Sept 2025Sun 14 Sept 2025Mon 15 Sept 2025Tue 16 Sept 2025Wed 17 Sept 2025Thu 18 Sept 2025Fri 19 Sept 2025Sat 20 Sept 2025Sun 21 Sept 2025
US federal holidaysUS federal holidays open Mon 25 Aug 2025US federal holidays open Tue 26 Aug 2025US federal holidays open Wed 27 Aug 2025US federal holidays open Thu 28 Aug 2025US federal holidays open Fri 29 Aug 2025US federal holidays closed for the weekend Sat 30 Aug 2025US federal holidays closed for the weekend Sun 31 Aug 2025US federal holidays closed Mon 1 Sept 2025: Labor DayUS federal holidays open Tue 2 Sept 2025US federal holidays open Wed 3 Sept 2025US federal holidays open Thu 4 Sept 2025US federal holidays open Fri 5 Sept 2025US federal holidays closed for the weekend Sat 6 Sept 2025US federal holidays closed for the weekend Sun 7 Sept 2025US federal holidays open Mon 8 Sept 2025US federal holidays open Tue 9 Sept 2025US federal holidays open Wed 10 Sept 2025US federal holidays open Thu 11 Sept 2025US federal holidays open Fri 12 Sept 2025US federal holidays closed for the weekend Sat 13 Sept 2025US federal holidays closed for the weekend Sun 14 Sept 2025US federal holidays open Mon 15 Sept 2025US federal holidays open Tue 16 Sept 2025US federal holidays open Wed 17 Sept 2025US federal holidays open Thu 18 Sept 2025US federal holidays open Fri 19 Sept 2025US federal holidays closed for the weekend Sat 20 Sept 2025US federal holidays closed for the weekend Sun 21 Sept 2025
  • Open
  • Closed
  • Weekend
  • Holiday on a weekend

Other calendars on Mon 1 Sept 2025

Monday 1 September 2025 on 7 other calendars
CalendarStatusWhy
Germany: nationwide public holidays (DE)No dataOutside this calendar's sources
T2 (TARGET RTGS) (EU-T2)No dataOutside this calendar's sources
CHAPS (GB-CHAPS)CHAPS open Mon 1 Sept 2025Business day
England and Wales bank holidays (GB-EAW)England and Wales bank holidays open Mon 1 Sept 2025Business day
FedACH Services (US-FEDACH)No dataOutside this calendar's sources
FedNow Service (US-FEDNOW)FedNow Service open Mon 1 Sept 2025Business day
Fedwire Funds Service (US-FEDWIRE)No dataOutside this calendar's sources

Sources

Zeitwide release 2026.11.04.1. Evidence and signed receipt for US federal holidays on Mon 1 Sept 2025

US federal holidays revision 44, published .

Cite this answer
Zeitwide (2026). US-FEDERAL on 2025-09-01. Release 2026.11.04.1. https://zeitwide.com/calendars/US-FEDERAL/2025-09-01

Questions people ask

When does US federal holidays reopen after Monday 1 September 2025?

US federal holidays reopens on Tuesday 2 September 2025.

Which days is US federal holidays closed?

US federal holidays is closed every Saturday and Sunday. It also closes on the holidays published by U.S. Office of Personnel Management.

Where does this answer come from?

U.S. Office of Personnel Management, last read 1 Nov 2026, 02:45 UTC. The operator published this date. It is in Zeitwide release 2026.11.04.1.

The same answer from the API

curl https://api.zeitwide.com/v1/calendars/US-FEDERAL/days/2025-09-01

{
  "date": "2025-09-01",
  "is_business_day": false,
  "reason": "Labor Day",
  "dataset_release": "2026.11.04.1"
}

Agents get it from the is_business_day MCP tool. The developer quickstart covers keys, MCP and webhooks