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Is Sunday 23 September 2029 a US federal holidays business day?

No: Sunday 23 September 2029 is not a US federal holidays business day, because US federal holidays is closed at weekends; US federal holidays reopens on Monday 24 September 2029 (Zeitwide release 2026.11.04.1).

28 days of US federal holidays around Sun 23 Sept 2029

US federal holidays, Sun 16 Sept 2029 to Sat 13 Oct 2029
CalendarSun 16 Sept 2029Mon 17 Sept 2029Tue 18 Sept 2029Wed 19 Sept 2029Thu 20 Sept 2029Fri 21 Sept 2029Sat 22 Sept 2029Sun 23 Sept 2029Mon 24 Sept 2029Tue 25 Sept 2029Wed 26 Sept 2029Thu 27 Sept 2029Fri 28 Sept 2029Sat 29 Sept 2029Sun 30 Sept 2029Mon 1 Oct 2029Tue 2 Oct 2029Wed 3 Oct 2029Thu 4 Oct 2029Fri 5 Oct 2029Sat 6 Oct 2029Sun 7 Oct 2029Mon 8 Oct 2029Tue 9 Oct 2029Wed 10 Oct 2029Thu 11 Oct 2029Fri 12 Oct 2029Sat 13 Oct 2029
US federal holidaysUS federal holidays closed for the weekend Sun 16 Sept 2029US federal holidays open Mon 17 Sept 2029US federal holidays open Tue 18 Sept 2029US federal holidays open Wed 19 Sept 2029US federal holidays open Thu 20 Sept 2029US federal holidays open Fri 21 Sept 2029US federal holidays closed for the weekend Sat 22 Sept 2029US federal holidays closed for the weekend Sun 23 Sept 2029US federal holidays open Mon 24 Sept 2029US federal holidays open Tue 25 Sept 2029US federal holidays open Wed 26 Sept 2029US federal holidays open Thu 27 Sept 2029US federal holidays open Fri 28 Sept 2029US federal holidays closed for the weekend Sat 29 Sept 2029US federal holidays closed for the weekend Sun 30 Sept 2029US federal holidays open Mon 1 Oct 2029US federal holidays open Tue 2 Oct 2029US federal holidays open Wed 3 Oct 2029US federal holidays open Thu 4 Oct 2029US federal holidays open Fri 5 Oct 2029US federal holidays closed for the weekend Sat 6 Oct 2029US federal holidays closed for the weekend Sun 7 Oct 2029US federal holidays closed Mon 8 Oct 2029: Columbus DayUS federal holidays open Tue 9 Oct 2029US federal holidays open Wed 10 Oct 2029US federal holidays open Thu 11 Oct 2029US federal holidays open Fri 12 Oct 2029US federal holidays closed for the weekend Sat 13 Oct 2029
  • Open
  • Closed
  • Weekend
  • Holiday on a weekend

Other calendars on Sun 23 Sept 2029

Sunday 23 September 2029 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)No dataOutside this calendar's sources
England and Wales bank holidays (GB-EAW)No dataOutside this calendar's sources
FedACH Services (US-FEDACH)FedACH Services closed for the weekend Sun 23 Sept 2029Weekend
FedNow Service (US-FEDNOW)FedNow Service open Sun 23 Sept 2029Business day
Fedwire Funds Service (US-FEDWIRE)Fedwire Funds Service closed for the weekend Sun 23 Sept 2029Weekend

Sources

No entry decides this date, so US federal holidays's weekend rule does. US federal holidays is closed every Saturday and Sunday.

Zeitwide release 2026.11.04.1. Evidence and signed receipt for US federal holidays on Sun 23 Sept 2029

US federal holidays revision 44, published .

Cite this answer
Zeitwide (2026). US-FEDERAL on 2029-09-23. Release 2026.11.04.1. https://zeitwide.com/calendars/US-FEDERAL/2029-09-23

Questions people ask

When does US federal holidays reopen after Sunday 23 September 2029?

US federal holidays reopens on Monday 24 September 2029.

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?

The calendar's weekend rule and no closure for it in U.S. Office of Personnel Management, in Zeitwide release 2026.11.04.1.

The same answer from the API

curl https://api.zeitwide.com/v1/calendars/US-FEDERAL/days/2029-09-23

{
  "date": "2029-09-23",
  "is_business_day": false,
  "dataset_release": "2026.11.04.1"
}

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