[5.x] Fix dates in localizations when duplicating entries (#11361)

Author: duncanmcclean

src/Actions/DuplicateEntry.php

@@ -88,7 +88,7 @@ private function duplicateEntry(Entry $original, ?string $origin = null)
             $entry->slug($slug);
         }
 
-        if ($original->hasDate()) {
+        if ($original->hasExplicitDate()) {
             $entry->date($original->date());
         }
 

src/Entries/Entry.php

@@ -622,6 +622,11 @@ public function hasSeconds()
         return $this->blueprint()->field('date')->fieldtype()->secondsEnabled();
     }
 
+    public function hasExplicitDate(): bool
+    {
+        return $this->hasDate() && $this->date;
+    }
+
     public function sites()
     {
         return $this->collection()->sites();