---
title: Week Number Header Render Hooks
---

In TimeGrid view, week numbers appear in the header above the time axis. Customize their appearance with these hooks.

`weekNumberHeaderClass` - a [ClassName Input](classname-input)

`weekNumberHeaderInnerClass` - a [ClassName Input](classname-input) for the inner wrapper of the week-number header (top-left axis cell). Useful for adjusting padding.

`weekNumberHeaderContent` - a [Content Injection Input](content-injection)

`weekNumberHeaderDidMount`

`weekNumberHeaderWillUnmount`


## Argument

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

- `num`
- `text`
- `textParts`
- `date` - Date object
- `isNarrow`
- `hasNavLink`
- `options` - the calendar options object, useful for reading settings like `dayMinWidth`