# Day-Header Divider Render Hooks

Customize the divider line beneath the day header cells in DayGrid & TimeGrid views.

`dayHeaderDividerClass` - a [ClassName Input](classname-input.md) for the day-header divider element


## Argument

When the above hook is specified as a function in the form `function(info)`, the `info` is an object with the following properties:

- `isSticky` - `true` when the divider is rendered in a sticky position (e.g. pinned while scrolling)
- `multiMonthColumns` - in [MultiMonth view](multimonth-grid.md), the number of month columns rendered per row. `0` in other views
- `options` - the calendar options object, useful for reading settings like `allDaySlot`