diff --git a/lib/administrate/field/date_time.rb b/lib/administrate/field/date_time.rb
index 2263af4d2a..28f4c74457 100644
--- a/lib/administrate/field/date_time.rb
+++ b/lib/administrate/field/date_time.rb
@@ -13,8 +13,7 @@ def date
       def datetime
         I18n.localize(
           data.in_time_zone(timezone),
-          format: format,
-          default: data
+          format: format
         )
       end
 
@@ -25,7 +24,7 @@ def format
       end
 
       def timezone
-        options.fetch(:timezone, ::Time.zone.name || "UTC")
+        options.fetch(:timezone, ::Time.zone)
       end
     end
   end