Source

File: wp-admin/includes/template.php

function touch_time( $edit = 1, $for_post = 1, $tab_index = 0, $multi = 0 ) {
	global $wp_locale;
	$post = get_post();

	if ( $for_post ) {
		$edit = ! ( in_array( $post->post_status, array( 'draft', 'pending' ), true ) && ( ! $post->post_date_gmt || '0000-00-00 00:00:00' === $post->post_date_gmt ) );
	}

	$tab_index_attribute = '';
	if ( (int) $tab_index > 0 ) {
		$tab_index_attribute = " tabindex=\"$tab_index\"";
	}

	// @todo Remove this?
	// echo '<label for="timestamp" style="display: block;"><input type="checkbox" class="checkbox" name="edit_date" value="1" id="timestamp"'.$tab_index_attribute.' /> '.__( 'Edit timestamp' ).'</label><br />';

	$post_date = ( $for_post ) ? $post->post_date : get_comment()->comment_date;
	$jj        = ( $edit ) ? mysql2date( 'd', $post_date, false ) : current_time( 'd' );
	$mm        = ( $edit ) ? mysql2date( 'm', $post_date, false ) : current_time( 'm' );
	$aa        = ( $edit ) ? mysql2date( 'Y', $post_date, false ) : current_time( 'Y' );
	$hh        = ( $edit ) ? mysql2date( 'H', $post_date, false ) : current_time( 'H' );
	$mn        = ( $edit ) ? mysql2date( 'i', $post_date, false ) : current_time( 'i' );
	$ss        = ( $edit ) ? mysql2date( 's', $post_date, false ) : current_time( 's' );

	$cur_jj = current_time( 'd' );
	$cur_mm = current_time( 'm' );
	$cur_aa = current_time( 'Y' );
	$cur_hh = current_time( 'H' );
	$cur_mn = current_time( 'i' );

	$month = '<label><span class="screen-reader-text">' . __( 'Month' ) . '</span><select ' . ( $multi ? '' : 'id="mm" ' ) . 'name="mm"' . $tab_index_attribute . ">\n";
	for ( $i = 1; $i < 13; $i = $i + 1 ) {
		$monthnum  = zeroise( $i, 2 );
		$monthtext = $wp_locale->get_month_abbrev( $wp_locale->get_month( $i ) );
		$month    .= "\t\t\t" . '<option value="' . $monthnum . '" data-text="' . $monthtext . '" ' . selected( $monthnum, $mm, false ) . '>';
		/* translators: 1: Month number (01, 02, etc.), 2: Month abbreviation. */
		$month .= sprintf( __( '%1$s-%2$s' ), $monthnum, $monthtext ) . "</option>\n";
	}
	$month .= '</select></label>';

	$day    = '<label><span class="screen-reader-text">' . __( 'Day' ) . '</span><input type="text" ' . ( $multi ? '' : 'id="jj" ' ) . 'name="jj" value="' . $jj . '" size="2" maxlength="2"' . $tab_index_attribute . ' autocomplete="off" /></label>';
	$year   = '<label><span class="screen-reader-text">' . __( 'Year' ) . '</span><input type="text" ' . ( $multi ? '' : 'id="aa" ' ) . 'name="aa" value="' . $aa . '" size="4" maxlength="4"' . $tab_index_attribute . ' autocomplete="off" /></label>';
	$hour   = '<label><span class="screen-reader-text">' . __( 'Hour' ) . '</span><input type="text" ' . ( $multi ? '' : 'id="hh" ' ) . 'name="hh" value="' . $hh . '" size="2" maxlength="2"' . $tab_index_attribute . ' autocomplete="off" /></label>';
	$minute = '<label><span class="screen-reader-text">' . __( 'Minute' ) . '</span><input type="text" ' . ( $multi ? '' : 'id="mn" ' ) . 'name="mn" value="' . $mn . '" size="2" maxlength="2"' . $tab_index_attribute . ' autocomplete="off" /></label>';

	echo '<div class="timestamp-wrap">';
	/* translators: 1: Month, 2: Day, 3: Year, 4: Hour, 5: Minute. */
	printf( __( '%1$s %2$s, %3$s at %4$s:%5$s' ), $month, $day, $year, $hour, $minute );

	echo '</div><input type="hidden" id="ss" name="ss" value="' . $ss . '" />';

	if ( $multi ) {
		return;
	}

	echo "\n\n";

	$map = array(
		'mm' => array( $mm, $cur_mm ),
		'jj' => array( $jj, $cur_jj ),
		'aa' => array( $aa, $cur_aa ),
		'hh' => array( $hh, $cur_hh ),
		'mn' => array( $mn, $cur_mn ),
	);

	foreach ( $map as $timeunit => $value ) {
		list( $unit, $curr ) = $value;

		echo '<input type="hidden" id="hidden_' . $timeunit . '" name="hidden_' . $timeunit . '" value="' . $unit . '" />' . "\n";
		$cur_timeunit = 'cur_' . $timeunit;
		echo '<input type="hidden" id="' . $cur_timeunit . '" name="' . $cur_timeunit . '" value="' . $curr . '" />' . "\n";
	}
	?>

<p>
<a href="#edit_timestamp" class="save-timestamp hide-if-no-js button"><?php _e( 'OK' ); ?></a>
<a href="#edit_timestamp" class="cancel-timestamp hide-if-no-js button-cancel"><?php _e( 'Cancel' ); ?></a>
</p>
	<?php
}