is_day() │ WP 1.5.0

Determines whether a day archive page is shown (example.com/2009/08/05) — page with posts for a specific day. A conditional tag.

This function is a part of is_date() and is_archive() check, so if you use them together, you should use is_day() before those functions, otherwise is_day() condition will never occur.

Uses: WP_Query::is_day()
1 time — 0.00007 sec (very fast) | 50000 times — 0.02 sec (speed of light)

No Hooks.

Return

true|false. Whether the query is for an existing day archive.

Usage

if( is_day() ){
	// ...
}

Examples

#1 Display text only on day archive pages

if( is_day() ){
	echo "This page is a page for 2019/08/15 [and link to example.com/2009/08/15]";
}

#2 Use of is_date() and is_day() together in if/else statements

if( is_day() )
	echo 'This is a day archive page.';
elseif( is_date() )
	echo 'This is a date archive page, for any date.';
else
	echo 'This is not a date archive page';

So is_archive() should follow is_day(), otherwise is_day() condition will never occur.

Notes

  • Global. WP_Query. $wp_query WordPress Query object.

Changelog

Since 1.5.0 Introduced.

Code of is_day() WP 6.0

wp-includes/query.php 
function is_day() {
	global $wp_query;

	if ( ! isset( $wp_query ) ) {
		_doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
		return false;
	}

	return $wp_query->is_day();
}

Conditional tags (page type and request)

Conditional tags (all)

Queries

Main Functions