---
title: "US Equities Market Holidays"
method: GET
path: "/v1/data/us-equity-ref/market-holidays"
tags: ["us-equity-ref-market-structure-compliance"]
---

# US Equities Market Holidays

`GET /v1/data/us-equity-ref/market-holidays`

The U.S. Equities Market Holidays dataset provides authoritative reference information on trading calendar events that affect U.S. equities and equity options markets, including full market holidays and early market closes. The dataset delivers a historical record of market schedules from 1998 to the present, enabling accurate modeling of trading availability, session boundaries, and non-trading days. It is designed to support time-series analysis, back-testing, and operational systems that require precise awareness of market open, close, and holiday conditions. While U.S. market calendars are publicly available, this dataset consolidates and structures the information into a machine-readable, historical reference format, optimized for systematic ingestion and long-term analysis.

 For more details, please refer to the dataset documentation: [US Equities Market Holidays Guide](https://us-equity-reference-docs.s3.us-east-1.amazonaws.com/algoseek.US.Equity.Market.Calendar.pdf).

<details>
<summary>**Advanced Filtering**</summary>

You can provide one or multiple filter expressions based on the dataset's columns to narrow down the results. For example, `StartDate.gt=2023-01-01&StartDate.lt=2023-12-31`, `Ticker=AAPL`. 

Please refer to the <a href="https://algoseek.com/docs/rest-api/tutorial/advanced-filtering">Advanced Filtering Guide</a> for the extensive reference.
</details>

## Query parameters

- `sort` string, nullable — Sorting criteria for the results. Provide a column name with optional prefix '+' for ascending order, or prefix with '-' for descending order. Multiple sorting fields may be supported depending on the dataset. If sort prefix is not provided, the ascending order is applied.
- `columns` string, nullable — A comma-separated list of columns to include in the response. Use this parameter to select only specific fields from the dataset. If not provided, all available columns will be returned.
- `offset` integer — Number of records to skip before returning results. To be used with the `limit` parameter for pagination. If not provided, defaults to 0.
- `limit` integer — Maximum number of records to return. Default and maximum values depend on the response format; see `format_limits` in the schema for details.
- `response_format` 'json' | 'csv' | 'csv_gzip' — Note the lowercase which is used for the consistency with other projects and tools

## Response `200`

JSON, CSV file, or gzip-compressed CSV file, depending on the value of `response_format` query parameter

- USEquitiesMarketHolidaysDataOut
  - `data` USEquitiesMarketHolidaysDataDetailsOut[], required
    - `Date` string, date, nullable — The date of the market holiday
  - `pagination` PaginationDetailsOut, required
    - `offset` integer — The number of records skipped to fetch the current page
    - `limit` integer, required — The maximum number of records in the current page
    - `next_offset` integer, nullable — The number of records to skip to fetch the next page

## Other responses

- `403` — Forbidden
- `422` — Validation Error
- `429` — Request rejected because the identity or team exceeded a configured monthly or per-minute usage quota. When available, the response includes rate-limit headers describing the current quota.

---

[API](https://skmtc.net/algoseek/apis/datasets-api.md) · [All operations](https://skmtc.net/algoseek/apis/datasets-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/algoseek/datasets-api/revisions/1c983de099e2/schema)