diff --git a/system/functions.php b/system/functions.php
index 212a043e..b3f1189f 100644
--- a/system/functions.php
+++ b/system/functions.php
@@ -1704,6 +1704,12 @@ function getAccountIdentityColumn(): string
 	return 'id';
 }
 
+function isCanary(): bool
+{
+	$vipSystemEnabled = configLua('vipSystemEnabled');
+	return isset($vipSystemEnabled);
+}
+
 // validator functions
 require_once SYSTEM . 'compat/base.php';
 
diff --git a/system/libs/pot/OTS_Account.php b/system/libs/pot/OTS_Account.php
index 872d1c89..5cee25a4 100644
--- a/system/libs/pot/OTS_Account.php
+++ b/system/libs/pot/OTS_Account.php
@@ -449,6 +449,11 @@ class OTS_Account extends OTS_Row_DAO implements IteratorAggregate, Countable
 			return max($ret, 0);
 		}
 
+		if (isCanary() && isset($this->data['lastday'])) {
+			$ret = ceil(($this->data['lastday'] - time()) / 86400);
+			return $ret > 0 ? $ret : 0;
+		}
+
 		if($this->data['premdays'] == 0) {
 			return 0;
 		}