diff --git a/src/libcalamares/locale/TimeZone.cpp b/src/libcalamares/locale/TimeZone.cpp
index 4bf23150a..dd8ffbf41 100644
--- a/src/libcalamares/locale/TimeZone.cpp
+++ b/src/libcalamares/locale/TimeZone.cpp
@@ -147,8 +147,7 @@ TZRegion::fromFile( const char* fileName )
         return model;
     }
 
-    QStringList regions;
-
+    TZRegion* thisRegion = nullptr;
     QTextStream in( &file );
     while ( !in.atEnd() )
     {
@@ -177,10 +176,16 @@ TZRegion::fromFile( const char* fileName )
             continue;
         }
 
-        if ( !regions.contains( region ) )
+        auto it
+            = std::find_if( model.begin(), model.end(), [&region]( const TZRegion* r ) { return r->m_key == region; } );
+        if ( it != model.end() )
+        {
+            thisRegion = *it;
+        }
+        else
         {
-            regions.append( region );
-            model.append( new TZRegion( region.toUtf8().data() ) );
+            thisRegion = new TZRegion( region.toUtf8().data() );
+            model.append( thisRegion );
         }
 
         QString countryCode = list.at( 0 ).trimmed();
@@ -190,11 +195,15 @@ TZRegion::fromFile( const char* fileName )
         }
 
         timezoneParts.removeFirst();
-        TZZone z( timezoneParts.join( '/' ).toUtf8().constData(), countryCode, list.at( 1 ) );
-        cDebug() << "Region" << region << z;
+        thisRegion->m_zones.append( new TZZone( timezoneParts.join( '/' ).toUtf8().constData(), countryCode, list.at( 1 ) ) );
     }
 
     std::sort( model.begin(), model.end(), []( const TZRegion* l, const TZRegion* r ) { return *l < *r; } );
+    for ( auto& r : model )
+    {
+        std::sort( r->m_zones.begin(), r->m_zones.end(), []( const TZZone* l, const TZZone* r ) { return *l < *r; } );
+    }
+
     return model;
 }
 
diff --git a/src/libcalamares/locale/TimeZone.h b/src/libcalamares/locale/TimeZone.h
index 6e4ba062d..896661b99 100644
--- a/src/libcalamares/locale/TimeZone.h
+++ b/src/libcalamares/locale/TimeZone.h
@@ -60,6 +60,8 @@ public:
 
     QString key() const { return m_key; }
 
+    bool operator<( const CStringPair& other ) const { return m_key < other.m_key; }
+
 protected:
     char* m_human = nullptr;
     QString m_key;
@@ -78,8 +80,6 @@ public:
     virtual ~TZRegion();
     QString tr() const override;
 
-    bool operator<( const TZRegion& other ) const { return m_key < other.m_key; }
-
     /** @brief Create model from a zone.tab-like file
      *
      * Returns a list of all the regions; each region has a list