New visit after midnight - setting for disabling this characteristic, refs #9156

config/global.ini.php

@@ -561,6 +561,10 @@ pivot_by_filter_enable_fetch_by_segment = 0
 ; on a per-request basis;
 pivot_by_filter_default_column_limit = 10
 
+; ONLY CHANGE THIS VALUE WHEN YOU DO NOT USE PIWIK ARCHIVING, SINCE THIS COULD CAUSE PARTIALLY MISSING ARCHIVE DATA
+; Whether to force a new visit at midnight for every visitor. Default 1.
+force_new_visit_midnight = 1
+
 [Tracker]
 
 ; Piwik uses "Privacy by default" model. When one of your users visit multiple of your websites tracked in this Piwik,

plugins/CoreHome/Tracker/VisitRequestProcessor.php

@@ -154,7 +154,9 @@ class VisitRequestProcessor extends RequestProcessor
         }
 
         $wasLastActionYesterday = $this->wasLastActionNotToday($visitProperties, $request);
-        if ($wasLastActionYesterday) {
+        $forceNewVisitAtMidnight = (bool) Config::getInstance()->General['force_new_visit_midnight'];
+
+        if ($wasLastActionYesterday && $forceNewVisitAtMidnight) {
             Common::printDebug("Visitor detected, but last action was yesterday...");
 
             return true;