bp_format_time( int|string $time = '', bool $exclude_time = false, bool $gmt = true )

function bp_format_time( $time = '', $exclude_time = false, $gmt = true ) {

	// Bail if time is empty or not numeric
	// @todo We should output something smarter here.
	if ( empty( $time ) || ! is_numeric( $time ) ) {
		return false;
	}

	// Get GMT offset from root blog.
	if ( true === $gmt ) {

		// Use Timezone string if set.
		$timezone_string = bp_get_option( 'timezone_string' );
		if ( ! empty( $timezone_string ) ) {
			$timezone_object = timezone_open( $timezone_string );
			$datetime_object = date_create( "@{$time}" );
			$timezone_offset = timezone_offset_get( $timezone_object, $datetime_object ) / HOUR_IN_SECONDS;

		// Fall back on less reliable gmt_offset.
		} else {
			$timezone_offset = bp_get_option( 'gmt_offset' );
		}

		// Calculate time based on the offset.
		$calculated_time = $time + ( $timezone_offset * HOUR_IN_SECONDS );

	// No localizing, so just use the time that was submitted.
	} else {
		$calculated_time = $time;
	}

	// Formatted date: "March 18, 2014".
	$formatted_date = date_i18n( bp_get_option( 'date_format' ), $calculated_time, $gmt );

	// Should we show the time also?
	if ( true !== $exclude_time ) {

		// Formatted time: "2:00 pm".
		$formatted_time = date_i18n( bp_get_option( 'time_format' ), $calculated_time, $gmt );

		// Return string formatted with date and time.
		$formatted_date = sprintf( esc_html__( '%1$s at %2$s', 'buddyboss' ), $formatted_date, $formatted_time );
	}

	/**
	 * Filters the date based on a UNIX timestamp.
	 *
	 * @since BuddyPress 1.0.0
	 *
	 * @param string $formatted_date Formatted date from the timestamp.
	 */
	return apply_filters( 'bp_format_time', $formatted_date );
}