# Count South Korea Working Days

> Counts authority-scope working and non-working dates in a range.

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

## Purpose

Counts authority-scope working and non-working dates in a range.

**Use when:** You need an auditable South Korea working-day count.

**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

- Count South Korea working days around New Labor Day public holiday.
- Count South Korea working days around Published substitute holiday.


## Input

| Parameter | Type | Unit | Required | Description |
| --- | --- | --- | --- | --- |
| `start_date` | date |  | required | First date in 2026-2026. |
| `end_date` | date |  | required | Last date in 2026-2026. |
| `include_start_date` | boolean |  | optional, default true | Whether start_date participates. |
| `include_end_date` | boolean |  | optional, default true | Whether end_date participates. |

## Output

| Field | Type | Unit | Description |
| --- | --- | --- | --- |
| `working_days` | integer |  | Authority-scope working dates. |
| `non_working_days` | integer |  | Weekend and exact authority events. |
| `public_holidays_counted` | list |  | Exact events in the range. |
| `territory` | string |  | KR (South Korea). |
| `territory_name` | string |  | South Korea |
| `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

`for each included date: working_days += status.is_working_day`

Normalize endpoints and count exact authority events over the declared weekday baseline.

## 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`. Pinned kr-public-holidays-2026.1 package.

## API

- `GET https://tttkmbb.com/api/v1/calculate/south-korea-public-working-days-between?start_date=…&end_date=…`
- `POST https://tttkmbb.com/api/v1/calculate/south-korea-public-working-days-between` 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-days-between · OpenAPI operationId `count_kr_working_days` 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-days-between", "inputs": {…}}`

## Example

- Coverage starts with a published event: inputs `{"start_date":"2026-01-01","end_date":"2026-01-01","include_start_date":true,"include_end_date":true}` → `{"working_days":0,"non_working_days":1}`

```
GET https://tttkmbb.com/api/v1/calculate/south-korea-public-working-days-between?start_date=2026-01-01&end_date=2026-01-01&include_start_date=true&include_end_date=true
```

## Limitations

The package covers the 2026 statutory/public-office schedule only; private-employer, school, bank, exchange, local-government and 2027 schedules are not inferred. Normalize endpoints and count exact authority events over the declared weekday baseline. 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

- [South Korea Working Day](https://tttkmbb.com/everyday/south-korea-public-working-day.md) — Inspect a date and source evidence.