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Is Sunday 28 May 2028 a US federal holidays business day?

No: Sunday 28 May 2028 is not a US federal holidays business day, because US federal holidays is closed at weekends; US federal holidays reopens on Tuesday 30 May 2028 (Zeitwide release 2026.11.04.1).

28 days of US federal holidays around Sun 28 May 2028

US federal holidays, Sun 21 May 2028 to Sat 17 Jun 2028
CalendarSun 21 May 2028Mon 22 May 2028Tue 23 May 2028Wed 24 May 2028Thu 25 May 2028Fri 26 May 2028Sat 27 May 2028Sun 28 May 2028Mon 29 May 2028Tue 30 May 2028Wed 31 May 2028Thu 1 Jun 2028Fri 2 Jun 2028Sat 3 Jun 2028Sun 4 Jun 2028Mon 5 Jun 2028Tue 6 Jun 2028Wed 7 Jun 2028Thu 8 Jun 2028Fri 9 Jun 2028Sat 10 Jun 2028Sun 11 Jun 2028Mon 12 Jun 2028Tue 13 Jun 2028Wed 14 Jun 2028Thu 15 Jun 2028Fri 16 Jun 2028Sat 17 Jun 2028
US federal holidaysUS federal holidays closed for the weekend Sun 21 May 2028US federal holidays open Mon 22 May 2028US federal holidays open Tue 23 May 2028US federal holidays open Wed 24 May 2028US federal holidays open Thu 25 May 2028US federal holidays open Fri 26 May 2028US federal holidays closed for the weekend Sat 27 May 2028US federal holidays closed for the weekend Sun 28 May 2028US federal holidays closed Mon 29 May 2028: Memorial DayUS federal holidays open Tue 30 May 2028US federal holidays open Wed 31 May 2028US federal holidays open Thu 1 Jun 2028US federal holidays open Fri 2 Jun 2028US federal holidays closed for the weekend Sat 3 Jun 2028US federal holidays closed for the weekend Sun 4 Jun 2028US federal holidays open Mon 5 Jun 2028US federal holidays open Tue 6 Jun 2028US federal holidays open Wed 7 Jun 2028US federal holidays open Thu 8 Jun 2028US federal holidays open Fri 9 Jun 2028US federal holidays closed for the weekend Sat 10 Jun 2028US federal holidays closed for the weekend Sun 11 Jun 2028US federal holidays open Mon 12 Jun 2028US federal holidays open Tue 13 Jun 2028US federal holidays open Wed 14 Jun 2028US federal holidays open Thu 15 Jun 2028US federal holidays open Fri 16 Jun 2028US federal holidays closed for the weekend Sat 17 Jun 2028
  • Open
  • Closed
  • Weekend
  • Holiday on a weekend

Other calendars on Sun 28 May 2028

Sunday 28 May 2028 on 7 other calendars
CalendarStatusWhy
Germany: nationwide public holidays (DE)No dataOutside this calendar's sources
T2 (TARGET RTGS) (EU-T2)T2 (TARGET RTGS) closed for the weekend Sun 28 May 2028Weekend
CHAPS (GB-CHAPS)CHAPS closed for the weekend Sun 28 May 2028Weekend
England and Wales bank holidays (GB-EAW)England and Wales bank holidays closed for the weekend Sun 28 May 2028Weekend
FedACH Services (US-FEDACH)FedACH Services closed for the weekend Sun 28 May 2028Weekend
FedNow Service (US-FEDNOW)FedNow Service open Sun 28 May 2028Business day
Fedwire Funds Service (US-FEDWIRE)Fedwire Funds Service closed for the weekend Sun 28 May 2028Weekend

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 28 May 2028

US federal holidays revision 44, published .

Cite this answer
Zeitwide (2026). US-FEDERAL on 2028-05-28. Release 2026.11.04.1. https://zeitwide.com/calendars/US-FEDERAL/2028-05-28

Questions people ask

When does US federal holidays reopen after Sunday 28 May 2028?

US federal holidays reopens on Tuesday 30 May 2028.

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/2028-05-28

{
  "date": "2028-05-28",
  "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