is_new_day() WP 1.0

Whether the publish date of the current post in the loop is different from the publish date of the previous post in the loop.

For more information on this and similar theme functions, check out the Conditional Tags article in the Theme Developer Handbook.

Is the basis for: the_date()

No Hooks.

Int. 1 when new day, 0 if not a new day.

is_new_day();

<?php
function is_new_day() {
	global $currentday, $previousday;
	if ( $currentday != $previousday )
		return 1;
	else
		return 0;
}