# Add Brazil Working Days

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

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

## Purpose

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

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

**Do not use when:** This is not a universal Brazilian private-employer calendar; state, municipal, sector, employer and private payroll schedules are not inferred.

## Example user requests

- Add or subtract Brazil working days around Tiradentes.


## 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 |  | BR (Brazil). |
| `territory_name` | string |  | Brazil |
| `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 |  | Brazil federal executive public administration (SIPEC) |
| `holiday_policy` | string |  | Portaria MGI federal public-administration national holidays and ponto facultativo events; optional events are preserved as federal-scope optional days |
| `substitute_day_policy` | string |  | No private-sector, state or municipal substitute-day rule is inferred |
| `calendar_profile` | string |  | brazil-federal-holidays |
| `dataset_version` | string |  | br-mgi-federal-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

- Brazil MGI 2026 normative acts listing — https://www.gov.br/gestao/pt-br/acesso-a-informacao/institucional/atos-normativos/2026/2026-portarias (government)
- Brazil MGI year-end recess guidance — https://www.gov.br/gestao/pt-br/assuntos/editoria-defeso-eleitoral/portaria-do-mgi-orienta-sobre-o-recesso-de-fim-de-ano-de-2026-no-servico-publico-federal/ (government)
- Brazil ANP Corpus Christi notice — https://www.gov.br/anp/pt-br/canais_atendimento/imprensa/noticias-comunicados/aviso-ponto-facultativo-nos-dias-4-e-5-de-junho (government)

Data freshness: `static`. Pinned br-mgi-federal-holidays-2026.1 package.

## API

- `GET https://tttkmbb.com/api/v1/calculate/brazil-federal-add-working-days?start_date=…&working_days=…`
- `POST https://tttkmbb.com/api/v1/calculate/brazil-federal-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/brazil-federal-add-working-days · OpenAPI operationId `add_br_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": "brazil-federal-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/brazil-federal-add-working-days?start_date=2026-01-01&working_days=0
```

## Limitations

This is not a universal Brazilian private-employer calendar; state, municipal, sector, employer and private payroll schedules are not inferred. 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

**Is ponto facultativo a national private-sector holiday?**

No. It is preserved here as a federal public-administration optional day and must not be treated as universal closure.

## Related

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