diff --git a/config/initializers/constants.rb b/config/initializers/constants.rb
index 357fd8f13..3b48409e1 100644
--- a/config/initializers/constants.rb
+++ b/config/initializers/constants.rb
@@ -99,7 +99,7 @@ class Constants
   DROPDOWN_TOP_OFFSET_PX = 20
 
   #=============================================================================
-  # Time
+  # Date and time
   #=============================================================================
 
   # URL expire time, used for presigned file URLs, because outsiders shouldn't
@@ -111,6 +111,8 @@ class Constants
   # URL); it expires in exactly one day
   URL_LONG_EXPIRE_TIME = 86_400
 
+  DATE_FORMAT = '%d.%m.%Y %H:%M'.freeze
+
   #=============================================================================
   # Application colors
   #