# Retrieve date math

## Get date math

<mark style="color:blue;">`GET`</mark> `https://ris.rightsline.com/v4/:entityType/:entityID/date-math`

This endpoint retrieves date math objects related to an entity.

#### Path Parameters

| Name       | Type    | Description                                                                              |
| ---------- | ------- | ---------------------------------------------------------------------------------------- |
| entityID   | integer | The unique ID of the entity that the date math is related to.                            |
| entityType | string  | The type of entity that the date math is related to. ex: deal, catalog-item, table, etc. |

#### Headers

| Name           | Type   | Description             |
| -------------- | ------ | ----------------------- |
| x-api-key      | string | Your company's API key. |
| Authentication | string | Authentication token.   |

{% tabs %}
{% tab title="200 Date math successfully retrieved." %}

```javascript
[
  {
    "result": "Contract Term Start earliest of 1/27/2018 and Contract Term End.",
    "dateMathCalcId": 2464929427129109,
    "compareToDate": "2018-01-27T08:00:00.000Z",
    "recalcOption": "Open",
    "conditionOption": "ASAP",
    "childCharacteristic": {
      "type": "Earliest Of",
      "entityTitle": "DealTest84",
      "entityTypeId": 4,
      "id": 3,
      "tagLabel": "contract_term_start",
      "label": "Contract Term Start",
      "characteristicId": 22
    },
    "parentCalcs": [
      {
        "dateMathRelId": 13570,
        "quantity": null,
        "isPriorTo": null,
        "yearQuantity": 0,
        "monthQuantity": 0,
        "weekQuantity": 0,
        "dayQuantity": 15,
        "dayUnit": "Days",
        "sortOrder": 0,
        "entityTitle": "DealTest84",
        "entityTypeId": 4,
        "id": 3,
        "tagLabel": "contract_term_end",
        "label": "Contract Term End",
        "characteristicId": 26
      }
    ]
  }
]
```

{% endtab %}
{% endtabs %}


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://api-docs.rightsline.com/date-math/date-math-retrieve.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.