---
title: "Changes to Get Market Hours Calendar."
method: GET
path: "/v1/calendars/market-hours"
---

# Changes to Get Market Hours Calendar.

`GET /v1/calendars/market-hours`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 5 of 62 revisions.

- **2026-10-21** `49c5c6b23633`: 1 warning, 3 info
- **2026-10-16** `1bd9eddeffc8`: 1 warning, 2 info
- **2026-07-14** `9632aa50482b`: 1 info
- **2026-07-14** `6ffc79452bbe`: 1 breaking
- **2026-07-14** `2d8a75e46de7`: 1 info

## Changes

- **2026-10-21** `49c5c6b23633`: 1 warning, 3 info
  - added the new `us_event_contracts` enum value to the `allOf[subschema #2]/data/items/market` response property for the response status `200`
  - added the new enum value `us_event_contracts` to the `query` request parameter `market`
  - added the optional property `allOf[subschema #2]/data/items/next_sessions/maintenance` to the response with the `200` status
  - added the optional property `allOf[subschema #2]/data/items/today_sessions/maintenance` to the response with the `200` status
- **2026-10-16** `1bd9eddeffc8`: 1 warning, 2 info
  - added the new `overnight` enum value to the `allOf[subschema #2]/data/items/status/current_session/oneOf[#/components/schemas/MarketSessionType]/` response property for the response status `200`
  - added the optional property `allOf[subschema #2]/data/items/next_sessions/overnight` to the response with the `200` status
  - added the optional property `allOf[subschema #2]/data/items/today_sessions/overnight` to the response with the `200` status
- **2026-07-14** `9632aa50482b`: 1 info
  - the `query` request parameter `date` became optional
- **2026-07-14** `6ffc79452bbe`: 1 breaking
  - the `query` request parameter `date` became required
- **2026-07-14** `2d8a75e46de7`: 1 info
  - the `query` request parameter `date` became optional

---

[Operation](https://skmtc.dev/clear-street/apis/clear-street-trading-api/docs/v1/calendars/market-hours/get.md) - [API](https://skmtc.dev/clear-street/apis/clear-street-trading-api.md) - [Page](https://skmtc.dev/clear-street/apis/clear-street-trading-api/changes/v1/calendars/market-hours/get)