Is Tuesday 18 August 2026 a US federal holidays business day?

Yes.

US federal holidays is open for settlement.

Open

Next business day: Wed 19 Aug 2026
Previous business day: Mon 17 Aug 2026

Decided by the weekend rule: saturday and sunday are closed on US federal holidays.

release 2026.10.29.1

Tue 18 Aug on other calendars

Calendar	Status	Why
Germany: nationwide public holidays DE	No data	Outside this calendar's sources
T2 (TARGET RTGS) EU-T2	Open	Business day
CHAPS GB-CHAPS	Open	Business day
England and Wales bank holidays GB-EAW	Open	Business day
FedACH Services US-FEDACH	Open	Business day
FedNow Service US-FEDNOW	Open	Business day
Fedwire Funds Service US-FEDWIRE	Open	Business day

Get this answer in code

curl -H "Authorization: Bearer $ZEITWIDE_API_KEY" \
  https://api.zeitwide.com/v1/calendars/US-FEDERAL/days/2026-08-18

{
  "date": "2026-08-18",
  "is_business_day": true,
  "dataset_release": "2026.10.29.1"
}

Agents get the same answer from the is_business_day MCP tool. Developer quickstart

Questions people ask

Is Tuesday 18 August 2026 a US federal holidays business day?: Yes. US federal holidays is open for settlement on Tuesday 18 August 2026. Next business day: Wed 19 Aug 2026. Previous: Mon 17 Aug 2026. Backed by official sources.
Can I be warned about changes like this?: Yes. Sign in and add US federal holidays to an alert rule for webhook alerts.

Around this date

Tue 18 Aug on other calendars

Get this answer in code

Questions people ask