Retrieves the date, in localized format.

This is a newer function, intended to replace `date_i18n()` without legacy quirks in it.

Note that, unlike `date_i18n()`, this function accepts a true Unix timestamp, not summed
with timezone offset.

function wp_date( $format, $timestamp = null, $timezone = null ) {
	global $wp_locale;

	if ( null === $timestamp ) {
		$timestamp = time();
	} elseif ( ! is_numeric( $timestamp ) ) {
		return false;
	}

	if ( ! $timezone ) {
		$timezone = wp_timezone();
	}

	$datetime = date_create( '@' . $timestamp );
	$datetime->setTimezone( $timezone );

	if ( empty( $wp_locale->month ) || empty( $wp_locale->weekday ) ) {
		$date = $datetime->format( $format );
	} else {
		// We need to unpack shorthand `r` format because it has parts that might be localized.
		$format = preg_replace( '/(?get_month( $datetime->format( 'm' ) );
		$weekday       = $wp_locale->get_weekday( $datetime->format( 'w' ) );

		for ( $i = 0; $i get_weekday_abbrev( $weekday ), 'A..Za..z' );
					break;
				case 'F':
					$new_format .= addcslashes( $month, 'A..Za..z' );
					break;
				case 'l':
					$new_format .= addcslashes( $weekday, 'A..Za..z' );
					break;
				case 'M':
					$new_format .= addcslashes( $wp_locale->get_month_abbrev( $month ), 'A..Za..z' );
					break;
				case 'a':
					$new_format .= addcslashes( $wp_locale->get_meridiem( $datetime->format( 'a' ) ), 'A..Za..z' );
					break;
				case 'A':
					$new_format .= addcslashes( $wp_locale->get_meridiem( $datetime->format( 'A' ) ), 'A..Za..z' );
					break;
				case '':
					$new_format .= $format[ $i ];

					// If character follows a slash, we add it without translating.
					if ( $i format( $new_format );
		$date = wp_maybe_decline_date( $date, $format );
	}

	/**
	 * Filters the date formatted based on the locale.
	 *
	 * @since 5.3.0
	 *
	 * @param string       $date      Formatted date string.
	 * @param string       $format    Format to display the date.
	 * @param int          $timestamp Unix timestamp.
	 * @param DateTimeZone $timezone  Timezone.
	 */
	$date = apply_filters( 'wp_date', $date, $format, $timestamp, $timezone );

	return $date;
}