---
title: "Date duration and business days"
method: GET
path: "/api/v1/calculate/date-duration"
---

# Date duration and business days

`GET /api/v1/calculate/date-duration`

## Request

- Base URL: `https://everycalc.xyz`
- URL: `https://everycalc.xyz/api/v1/calculate/date-duration`
- Auth: none declared

Inclusive number of days between two dates, plus business days after optionally excluding weekends and 2026 US federal holidays, calendar weeks, weekend days, and holidays in the range. Results match the interactive calculator at everycalc.xyz; every response includes a calculator_url deep link to it.

## Query parameters

- `start_date` string, required
- `end_date` string, required
- `exclude_weekends` boolean
- `exclude_holidays` boolean

## Response `200`

Calculation result.

## Other responses

- `400`: Invalid input.

---

[API](https://skmtc.dev/everycalc/apis/everycalc-api.md) · [All operations](https://skmtc.dev/everycalc/apis/everycalc-api/llms.txt) · [OpenAPI document](https://skmtc.dev/everycalc/apis/everycalc-api/revisions/a4bd5db0868a?raw)