---
title: popoverFormat
---

Determines the date format of title of the popover created by the [moreLinkClick](moreLinkClick) option.

<div class='spec'>

[Date Formatter](date-formatting), *default*:

```js
{ month: 'long', day: 'numeric', year: 'numeric' }
```

</div>

The default value produces strings like `Monday, September 24`.