# Add Luxembourg Working Days

> Adds or subtracts Luxembourg authority-scope working days in exact coverage. Requires explicit mon_fri_planning; personal compensatory leave and bank-only closures are not computed.

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

## Purpose

Adds or subtracts Luxembourg authority-scope working days in exact coverage. Requires explicit mon_fri_planning; personal compensatory leave and bank-only closures are not computed.

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

**Do not use when:** Luxembourg 2026-2028 statutory holiday dates over an explicitly selected Monday-Friday planning baseline, BEFORE individual annual or compensatory leave. A holiday on a normally non-worked day may produce compensatory leave depending on the employee's schedule, hours and applicable rules; no compensation date or next-Monday closure is assigned here. Bank-only Good Friday/Christmas Eve afternoon, customary or collectively agreed holidays, school/local/employer/shift schedules, hours, payroll, personal entitlements and legal deadlines are not computed.

## Example user requests

- Add or subtract Luxembourg working days around Europe Day is statutory rest.
- Add or subtract Luxembourg working days around No uniform Monday compensation date.
- Add or subtract Luxembourg working days around Bank-only Good Friday is not general statutory rest.


## Input

| Parameter | Type | Unit | Required | Description |
| --- | --- | --- | --- | --- |
| `start_date` | date |  | required | Gregorian start date in 2026-2028. |
| `working_days` | integer |  | required | Signed offset; start date excluded for non-zero offsets. (min -1000, max 1000) |
| `work_schedule` | enum: mon_fri_planning |  | required | Required explicit Monday-Friday planning baseline BEFORE individual annual/compensatory leave; not a personal roster. |

## 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 |  | LU (Luxembourg). |
| `territory_name` | string |  | Luxembourg |
| `day_type` | string |  | statutory_holiday_rest, weekend_baseline or regular_workday. |
| `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 |  | Luxembourg 2026-2028 eleven annual statutory holidays with explicit Monday-Friday planning baseline before individualized leave |
| `holiday_policy` | string |  | Eleven_L232_2_statutory_holidays_per_year; individualized_compensation_not_computed |
| `substitute_day_policy` | string |  | No_uniform_next_Monday_or_compensatory_leave_date_assigned |
| `calendar_profile` | string |  | luxembourg-public-holidays |
| `dataset_version` | string |  | lu-statutory-calendar-2026-2028.1 |
| `sources` | list |  | Authority and legislation sources. |
| `work_schedule` | string |  | Explicit mon_fri_planning baseline. |
| `is_statutory_non_working_day` | boolean |  | Whether result.date is one of eleven annual general statutory holiday dates; not personal attendance. |
| `holiday_on_baseline_weekend` | boolean |  | Statutory holiday falls on Saturday/Sunday. Calendar fact only, not an individual compensatory entitlement. |
| `compensatory_leave_scope` | string |  | Always not_computed; personal schedule and applicable rules required. |
| `compensatory_date_policy` | string |  | Always no_dates_assigned; not a denial of compensatory leave. |
| `personal_roster_scope` | string |  | Always not_computed. |
| `payroll_scope` | string |  | Always not_computed. |

## Formula

`planning_workday = weekday AND no statutory_holiday_rest; individual leave is not deducted`

Apply eleven official statutory dates per year to the explicit Monday-Friday planning baseline. No uniform Monday substitute, personal compensatory date or payroll inference.

## Data Sources

- ITM: Jours feries legaux, dated table 2025-2030 — https://itm.public.lu/fr/conditions-travail/conges/jours-feries.html (government_calendar, retrieved 2026-09-29T09:36:39.9903574Z)
- Luxembourg government portal: Public holidays — https://luxembourg.public.lu/en/living/quality-of-life/jours-feries-legaux.html (government_calendar, retrieved 2026-09-29T09:36:42.2745856Z)
- ITM D9a2: Eleven statutory holidays — https://itm.public.lu/fr/questions-reponses/droit-travail/jours-feries-legaux/a/a2.html (government_guidance, retrieved 2026-09-29T09:36:44.1579793Z)
- ITM D9a4: Holiday on a normally non-worked day — https://itm.public.lu/fr/questions-reponses/droit-travail/jours-feries-legaux/a/a4.html (government_guidance, retrieved 2026-09-29T09:36:46.3494224Z)
- ITM D9a9: Customary holidays — https://itm.public.lu/fr/questions-reponses/droit-travail/jours-feries-legaux/a/a9.html (government_guidance, retrieved 2026-09-29T09:36:49.5574149Z)
- Guichet: Working on public holidays — https://guichet.public.lu/en/citoyens/travail/conges-jours-feries/jours-feries/travail-jours-feries.html (government_guidance, retrieved 2026-09-29T09:36:53.7293922Z)
- Official Luxembourg Open Data Portal: Jours feries legaux au Luxembourg — https://data.public.lu/fr/datasets/jours-feries-legaux-au-luxembourg/ (official_open_data_catalog, retrieved 2026-09-29T09:37:56.2551555Z)
- Official Luxembourg Open Data: holidays.json snapshot — https://download.data.public.lu/resources/jours-feries-legaux-au-luxembourg/20260901-040008/holidays.json (official_open_dataset, retrieved 2026-09-29T09:37:25.6845470Z)

Data freshness: `static`. Pinned lu-statutory-calendar-2026-2028.1 package.

## API

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

## Example

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

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

## Limitations

Luxembourg 2026-2028 statutory holiday dates over an explicitly selected Monday-Friday planning baseline, BEFORE individual annual or compensatory leave. A holiday on a normally non-worked day may produce compensatory leave depending on the employee's schedule, hours and applicable rules; no compensation date or next-Monday closure is assigned here. Bank-only Good Friday/Christmas Eve afternoon, customary or collectively agreed holidays, school/local/employer/shift schedules, hours, payroll, personal entitlements and legal deadlines are not computed. Apply eleven official statutory dates per year to the explicit Monday-Friday planning baseline. No uniform Monday substitute, personal compensatory date or payroll inference. All values are computed from the formula above; no measurement or live data is involved.

## FAQ

**Is the Monday after a weekend holiday automatically off?**

No uniform next-Monday date is assigned by this package. Compensatory leave can depend on the person's normal work schedule and must be arranged under applicable rules; this tool neither denies nor computes that entitlement.

**Does the annual working-day count include my compensatory leave?**

No. It is a Monday-Friday calendar count before personal annual leave, compensatory leave and employer/collective arrangements. Do not use it as actual annual attendance or payroll.

**Are Good Friday, All Souls or Christmas Eve statutory days off?**

They are not among the eleven general statutory holidays. Bank, collective, customary or employer arrangements may differ and are outside this profile.

**What makes the data reproducible?**

Pinned official CC0 JSON dates in four languages are cross-checked with the ITM French year table. Source URLs, retrieval times, SHA-256 hashes, coverage and limitations accompany results.

## Related

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