# Workday Calendar API – Single Date Business Day Check

> Workday Calendar API – Single Date Business Day Check is a paid API for AI agents from workday-calendar.regnotes.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-30).

Returns whether a specific date is a business day in a given country, accounting for public holidays, weekends, and make-up workdays, plus the adjacent previous and next business days.

## Facts

- Endpoint: GET https://workday-calendar.regnotes.workers.dev/v1/business-day?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/workday-calendar-api-single-date-business-day-check-1e1b490b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_0TIpeK7ELluOxeqI4j0MW

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability workday-calendar-api-single-date-business-day-check-1e1b490b
```

Example prompt: Is November 3, 2026 a business day in Japan, and if not, what's the next working day?

## When to prefer this

Use this endpoint when you need to check a single specific date's business day status in one of 50+ supported countries, with full awareness of national public holidays, standard weekends, and make-up workdays. Prefer this over general date libraries when country-specific holiday data and make-up workday logic are required. For counting business days between two dates or computing an offset of N business days, use the sibling endpoints on the same provider.

## Known failure modes

- Invalid date format (not YYYY-MM-DD) returns a 400 error
- Unsupported country code (not in the allowed enum) returns a 400 error
- Date out of supported range may return an error or empty result
- Payment failure (x402) if USDC balance is insufficient returns a 402 error

## How this service works

Whether a date is a business day in a country (holiday/weekend/make-up workday aware), plus the previous and next business day.

## Output

A JSON object with: the queried date and country, the holiday name (if applicable), the weekday number, boolean flags for weekend/business_day/weekend_workday, and the ISO dates of the next and previous business days.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "country",
      "date"
     ],
     "properties": {
      "date": {
       "type": "string",
       "pattern": "^\\d{4}-\\d{2}-\\d{2}$"
      },
      "country": {
       "enum": [
        "US",
        "CA",
        "MX",
        "BR",
        "AR",
        "CL",
        "CO",
        "PE",
        "GB",
        "IE",
        "FR",
        "DE",
        "NL",
        "BE",
        "LU",
        "CH",
        "AT",
        "IT",
        "ES",
        "PT",
        "SE",
        "NO",
        "DK",
        "FI",
        "PL",
        "CZ",
        "HU",
        "RO",
        "GR",
        "TR",
        "IL",
        "AE",
        "SA",
        "EG",
        "ZA",
        "NG",
        "KE",
        "IN",
        "PK",
        "BD",
        "LK",
        "SG",
        "MY",
        "ID",
        "TH",
        "VN",
        "PH",
        "HK",
        "TW",
        "CN",
        "JP",
        "KR",
        "AU",
        "NZ",
        "UA"
       ],
       "type": "string",
       "description": "ISO 3166-1 alpha-2 country code"
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "date": "2026-11-03",
  "country": "JP",
  "holiday": "Culture Day",
  "weekday": 2,
  "weekend": false,
  "business_day": false,
  "weekend_workday": false,
  "next_business_day": "2026-11-04",
  "previous_business_day": "2026-11-02"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/workday-calendar-api-single-date-business-day-check-1e1b490b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from workday-calendar.regnotes.workers.dev](https://www.zero.xyz/host/workday-calendar.regnotes.workers.dev/llms.txt)