# Add Canada Federal Working Days

> Adds or subtracts dates using Canada federal general holidays and a Saturday/Sunday baseline; schedule-dependent substitute days remain unresolved.

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

## Purpose

Adds or subtracts dates using Canada federal general holidays and a Saturday/Sunday baseline; schedule-dependent substitute days remain unresolved.

**Use when:** You need a deterministic baseline offset for a federally regulated-employer calendar in 2026-2027.

**Do not use when:** You need a provincial, private-employer or schedule-specific substitution result.

## Example user requests

- Add five Canada federal working days after 2026-09-28.


## Input

| Parameter | Type | Unit | Required | Description |
| --- | --- | --- | --- | --- |
| `start_date` | date |  | required | Gregorian start date in 2026-2027. |
| `working_days` | integer |  | required | Signed offset; start date is 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. |
| `federal_general_holidays_skipped` | list |  | Canada general holidays crossed. |
| `territory` | string |  | CA. |
| `territory_name` | string |  | Canada. |
| `day_type` | string |  | Regular weekday, regular weekend or Canada federal general holiday. |
| `holiday_names` | string_list |  | Canada Labour Code general holidays applying on the date. |
| `holiday_observed` | boolean |  | False because substitute dates depend on schedule and agreement and are not inferred. |
| `holiday_actual_dates` | string_list |  | Actual general-holiday dates. |
| `weekend_days` | string_list |  | CLDR Saturday/Sunday baseline. |
| `rest_day_policy` | string |  | Scheduled-workday and employer substitution rules are not inferred. |
| `substitute_day_policy` | string |  | Canada.ca rule summary with schedule-dependent boundary. |
| `calendar_scope` | string |  | Federally regulated employers only. |
| `calendar_profile` | string |  | canada-federal-general-holidays. |
| `dataset_version` | string |  | Pinned Canada.ca evidence package. |
| `sources` | list |  | Official Canada.ca and Canada Labour Code sources. |

## Formula

`move one day at a time; decrement remaining only when Canada federal status.is_working_day=true`

Skip the CLDR CA weekend baseline and actual Canada general-holiday dates; do not infer substitution.

## Data Sources

- Government of Canada annual vacations and general holidays — https://www.canada.ca/en/services/jobs/workplace/federal-labour-standards/vacations-holidays.html (government, published 2025-12-12)
- Canada Labour Code Part III, Division V — https://laws-lois.justice.gc.ca/eng/acts/l-2/page-31.html (legislation)

Data freshness: `static`. Pinned Canada.ca 2026-2027 package.

## API

- `GET https://tttkmbb.com/api/v1/calculate/canada-federal-add-working-days?start_date=…&working_days=…`
- `POST https://tttkmbb.com/api/v1/calculate/canada-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/canada-federal-add-working-days · OpenAPI operationId `add_canada_federal_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: `add_canada_federal_working_days` (dedicated) or `run_calculator` with `{"calculator_id": "canada-federal-add-working-days", "inputs": {…}}`

## Example

- Offset across Truth and Reconciliation Day: inputs `{"start_date":"2026-09-29","working_days":1}` → `{"result_date":"2026-10-01"}`

```
GET https://tttkmbb.com/api/v1/calculate/canada-federal-add-working-days?start_date=2026-09-29&working_days=1
```

## Limitations

You need a provincial, private-employer or schedule-specific substitution result. Skip the CLDR CA weekend baseline and actual Canada general-holiday dates; do not infer substitution. All values are computed from the formula above; no measurement or live data is involved.

## FAQ

**Can this determine an employee's substitute day?**

No. It returns a deterministic actual-holiday baseline and exposes the schedule-dependent limitation.

## Related

- [Canada Federal General-Holiday Working Day](https://tttkmbb.com/everyday/canada-federal-working-day.md) — Inspect one date and its source basis.