# Add Vietnam Working Days

> Adds or subtracts Vietnam authority-scope working days in exact coverage.

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

## Purpose

Adds or subtracts Vietnam authority-scope working days in exact coverage.

**Use when:** You need a deterministic Vietnam working-day offset.

**Do not use when:** Public-sector and statutory paid-holiday layer only; private-employer, non-Saturday/Sunday workweeks, provincial, sector, bank, school and employer schedules are not inferred. The proposed four-day 2026 Vietnam Cultural Day public-sector arrangement is not encoded until finally approved.

## Example user requests

- Add or subtract Vietnam working days around New Year transfer.
- Add or subtract Vietnam working days around Vietnam Cultural Day.


## Input

| Parameter | Type | Unit | Required | Description |
| --- | --- | --- | --- | --- |
| `start_date` | date |  | required | Gregorian start date in 2026-2026. |
| `working_days` | integer |  | required | Signed offset; start date excluded for non-zero offsets. (min -1000, max 1000) |

## Output

| Field | Type | Unit | Description |
| --- | --- | --- | --- |
| `start_date` | date |  | Input date. |
| `result_date` | date |  | Date reached. |
| `working_days_added` | integer |  | Signed requested offset. |
| `calendar_days_elapsed` | integer |  | Signed Gregorian difference. |
| `public_holidays_skipped` | list |  | Exact events crossed. |
| `territory` | string |  | VN (Vietnam). |
| `territory_name` | string |  | Vietnam |
| `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 |  | Vietnam public-sector 2026 holiday schedule and nationwide statutory paid holidays |
| `holiday_policy` | string |  | Vietnam_2026_public_sector_schedule_plus_statutory_paid_holidays |
| `substitute_day_policy` | string |  | published_2026_transfers_only; private_employer_options_and_unapproved_proposals_not_inferred |
| `calendar_profile` | string |  | vietnam-public-holidays |
| `dataset_version` | string |  | vn-public-holidays-2026.1 |
| `sources` | list |  | Authority and legislation sources. |

## Formula

`move one day at a time; decrement only on status.is_working_day=true`

Skip Saturday/Sunday and exact pinned authority events; do not add unverified substitute days.

## Data Sources

- Government News / Ministry of Home Affairs – 2026 holiday schedule — https://en.baochinhphu.vn/ministry-of-home-affairs-announces-2026-holiday-schedule-111251017163421877.htm (government_official_announcement)
- Government policy portal – 2026 Hung Kings, Reunification, Labour and National Day schedule — https://xaydungchinhsach.chinhphu.vn/lich-nghi-le-gio-to-hung-vuong-30-4-1-5-quoc-khanh-2-9-nam-2026-119260222115822151.htm (government_official_schedule)
- Government policy portal – Vietnam Cultural Day — https://xaydungchinhsach.chinhphu.vn/ngay-24-11-hang-nam-la-ngay-van-hoa-viet-nam-nguoi-lao-dong-duoc-nghi-huong-nguyen-luong-119260113152642414.htm (government_official_legislation_notice)
- Government policy portal – 2026 New Year schedule — https://xaydungchinhsach.chinhphu.vn/lich-nghi-tet-duong-lich-2026-119251225111725138.htm (government_official_schedule)
- Government legal portal – Labour Code — https://vanban.chinhphu.vn/?classid=1&docid=163542&pageid=27160 (labour_legislation)
- VnExpress – 2026 New Year schedule cross-check — https://vnexpress.net/chot-nghi-tet-duong-lich-4-ngay-4997949.html (reputable_news_cross_check)

Data freshness: `static`. Pinned vn-public-holidays-2026.1 package.

## API

- `GET https://tttkmbb.com/api/v1/calculate/vietnam-public-add-working-days?start_date=…&working_days=…`
- `POST https://tttkmbb.com/api/v1/calculate/vietnam-public-add-working-days` 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/vietnam-public-add-working-days · OpenAPI operationId `add_vn_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": "vietnam-public-add-working-days", "inputs": {…}}`

## Example

- Zero offset is identity: inputs `{"start_date":"2026-01-01","working_days":0}` → `{"result_date":"2026-01-01","working_days_added":0}`

```
GET https://tttkmbb.com/api/v1/calculate/vietnam-public-add-working-days?start_date=2026-01-01&working_days=0
```

## Limitations

Public-sector and statutory paid-holiday layer only; private-employer, non-Saturday/Sunday workweeks, provincial, sector, bank, school and employer schedules are not inferred. The proposed four-day 2026 Vietnam Cultural Day public-sector arrangement is not encoded until finally approved. Skip Saturday/Sunday and exact pinned authority events; do not add unverified substitute days. All values are computed from the formula above; no measurement or live data is involved.

## FAQ

**Does this decide a private company's day off?**

No. Vietnam's private employers may choose compliant schedules for some holiday periods, and employer, sector and roster rules are outside this package.

**Is the proposed four-day Vietnam Cultural Day break included?**

No. Only the enacted 24 November paid holiday is included; the proposed multi-day public-sector arrangement is not treated as final.

## Related

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