> ## Documentation Index
> Fetch the complete documentation index at: https://docs.chift.eu/llms.txt
> Use this file to discover all available pages before exploring further.

# Book year

### Definition

A **book year** (also called **fiscal year** or **financial year**) represents a specific accounting period (typically 12 months) within a folder. It defines the temporal structure that accounting systems universally impose.

### Purpose

Book years define the accounting period for a folder. All transactions must be recorded within an open book year. Companies report financial results per book year.

### Relationships

* Belongs to a specific **folder**.
* Contains all accounting records for that accounting period.
* Multiple book years can exist within a folder for historical management, but usually only one is active at a time.
* Operations are typically prohibited on closed book years.

### Endpoints

| Method | Endpoint                                                            | Description                      |
| ------ | ------------------------------------------------------------------- | -------------------------------- |
| GET    | [Get bookyears](/api-reference/endpoints/accounting/get-book-years) | List all book years for a folder |

### See also

* [Journals](/unified-apis/accounting/concepts/journal)
* [Journal entries](/unified-apis/accounting/concepts/journal-entry)
* [Folder](/unified-apis/accounting/concepts/folder)