# Add Mexico Working Days

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

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

## Purpose

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

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

**Do not use when:** Article 69 weekly rest is at least one day after six days and the employer/worker schedule is not inferred; sector, state, employer, school and bank calendars are outside scope.

## Example user requests

- Add or subtract Mexico working days around Constitution Day observed.


## Input

| Parameter | Type | Unit | Required | Description |
| --- | --- | --- | --- | --- |
| `start_date` | date |  | required | Gregorian start date in 2026-2027. |
| `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 |  | MX (Mexico). |
| `territory_name` | string |  | Mexico |
| `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 |  | Mexico Federal Labour Law mandatory rest days |
| `holiday_policy` | string |  | Article 74 mandatory rest days; first/third Mondays are represented by their statutory observed dates |
| `substitute_day_policy` | string |  | Election-day and six-year executive-transition dates are not inserted without the applicable electoral/constitutional schedule |
| `calendar_profile` | string |  | mexico-labor-rest-days |
| `dataset_version` | string |  | mx-lft-mandatory-rest-days-2026-09-29.1 |
| `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

- Mexico Federal Labour Law current official PDF — https://www.diputados.gob.mx/LeyesBiblio/pdf/LFT.pdf (government_legislation)
- Mexico Federal Labour Law official reference page — https://www.diputados.gob.mx/LeyesBiblio/ref/lft.htm (government_legislation)
- Orden Jurídico Federal Labour Law text — https://www.ordenjuridico.gob.mx/Documentos/Federal/html/wo125151.html (government_legislation)

Data freshness: `static`. Pinned mx-lft-mandatory-rest-days-2026-09-29.1 package.

## API

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

## Limitations

Article 69 weekly rest is at least one day after six days and the employer/worker schedule is not inferred; sector, state, employer, school and bank calendars are outside scope. 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 infer each employee's weekly rest day?**

No. Article 69 requires at least one rest day in six and Article 70 leaves continuous schedules to employer/worker arrangements; only Article 74 statutory rest dates are returned.

## Related

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