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

# Date & Time

> Use datetime attributes in the Breakcold API.

## Attribute type

`datetime`

## Use it for

Timestamped values such as last interaction, next follow-up, or meeting time.

## Request value

Send a Unix timestamp in milliseconds.

```json theme={null}
{
  "fields": {
    "next_follow_up_at": 1767270600000
  }
}
```

## Returned shape

Returns a Unix timestamp in milliseconds.

## Example response

```json theme={null}
{
  "fields": {
    "next_follow_up_at": 1767270600000
  }
}
```