# South Korea Working Day

> Checks a date against the Saturday-Sunday weekend baseline and exact 2026-2026 authority events.

- Calculator id: `south-korea-public-working-day` · Category: Everyday Life (`everyday`) · Tool name: `check_kr_working_day`
- Canonical page: https://tttkmbb.com/everyday/south-korea-public-working-day · This document: https://tttkmbb.com/everyday/south-korea-public-working-day.md · JSON definition: https://tttkmbb.com/everyday/south-korea-public-working-day.json

## Purpose

Checks a date against the Saturday-Sunday weekend baseline and exact 2026-2026 authority events.

**Use when:** You need a deterministic South Korea South Korea statutory public holidays and public-office substitute holidays for 2026 result.

**Do not use when:** The package covers the 2026 statutory/public-office schedule only; private-employer, school, bank, exchange, local-government and 2027 schedules are not inferred.

## Example user requests

- South Korea: New Labor Day public holiday.
- South Korea: Published substitute holiday.


## Input

| Parameter | Type | Unit | Required | Description |
| --- | --- | --- | --- | --- |
| `date` | date |  | required | Gregorian date in South Korea coverage. |

## Output

| Field | Type | Unit | Description |
| --- | --- | --- | --- |
| `territory` | string |  | KR (South Korea). |
| `territory_name` | string |  | South Korea |
| `weekday` | string |  | Gregorian weekday. |
| `is_working_day` | boolean |  | Monday-Friday with no event in this pinned authority scope. |
| `day_type` | string |  | Deterministic classification: official_weekend, regular_workday, or the first published authority event kind. |
| `holiday_names` | string_list |  | Events applying on the date. |
| `holiday_kinds` | string_list |  | Authority event classifications. |
| `holiday_details` | list |  | Structured event details, including partial-day notes where published. |
| `calendar_scope` | string |  | South Korea statutory public holidays and public-office substitute holidays for 2026 |
| `holiday_policy` | string |  | National, substitute and election holiday event kinds are preserved; this is not a universal private-employer or school closure calendar. |
| `substitute_day_policy` | string |  | Only the published 2026 substitute dates are included; employer exchanges, local-government holidays and school schedules are not inferred. |
| `calendar_profile` | string |  | south-korea-public-holidays |
| `dataset_version` | string |  | kr-public-holidays-2026.1 |
| `sources` | list |  | Authority and legislation sources. |

## Formula

`is_working_day = not an official Saturday/Sunday weekend date and no exact authority event`

Apply the pinned authority event table over the declared weekday baseline; do not infer uncovered employer or regional schedules.

## Data Sources

- Korea National Law Information Center – public holidays regulation — https://www.law.go.kr/LSW/lsLinkCommonInfo.do?lsJoLnkSeq=1033028569 (government_law)
- Ministry of Personnel Management – Labor Day and Constitution Day public holidays — https://www.mpm.go.kr/mpm/comm/newsPress/newsPressRelease/?boardId=bbs_0000000000000029&category=&cntId=4250 (government_press_release)
- Ministry of Employment and Labor – Labor Day public-holiday implementation — https://moel.go.kr/news/enews/report/enewsView.do?news_seq=19254 (government_press_release)
- Korea Astronomy and Space Science Institute – 2026 calendar data — https://astro.kasi.re.kr/kor/life/post/calendarData?search_year=2026 (government_calendar_reference)

Data freshness: `static`. Refresh after the South Korea authority publishes a new schedule.

## API

- `GET https://tttkmbb.com/api/v1/calculate/south-korea-public-working-day?date=…`
- `POST https://tttkmbb.com/api/v1/calculate/south-korea-public-working-day` with JSON body `{"inputs": {…}}`
- Response: unified envelope (`success`, `request`, `result.values`, `result.units`, `sources`, `freshness`, `timestamp`, `next_actions`, `links`); see https://tttkmbb.com/docs/response-format.md
- Schema: https://tttkmbb.com/api/v1/calculators/south-korea-public-working-day · OpenAPI operationId `check_kr_working_day` in https://tttkmbb.com/openapi.json
- Authentication: none. Rate limit: fair use, see https://tttkmbb.com/docs/rate-limits.md.

## MCP

- Server: `https://tttkmbb.com/mcp` (Streamable HTTP, JSON-RPC 2.0, no auth)
- Tool:  `run_calculator` with `{"calculator_id": "south-korea-public-working-day", "inputs": {…}}`

## Example

- New Labor Day public holiday: inputs `{"date":"2026-05-01"}` → `{"is_working_day":false,"day_type":"national_holiday"}`
- Published substitute holiday: inputs `{"date":"2026-10-05"}` → `{"is_working_day":false,"day_type":"substitute_holiday"}`

```
GET https://tttkmbb.com/api/v1/calculate/south-korea-public-working-day?date=2026-05-01
```

## Limitations

The package covers the 2026 statutory/public-office schedule only; private-employer, school, bank, exchange, local-government and 2027 schedules are not inferred. Apply the pinned authority event table over the declared weekday baseline; do not infer uncovered employer or regional schedules. All values are computed from the formula above; no measurement or live data is involved.

## FAQ

**Does this represent every Korean employer's closure calendar?**

No. It is a statutory/public-office evidence package for 2026; employer, school, bank, exchange and local schedules are not inferred.

## Related

- [Add South Korea Working Days](https://tttkmbb.com/everyday/south-korea-public-add-working-days.md) — Offset through the same authority package.