Redmine

+1 I agree, I get a lot of "bug" reports from people entering time incorrectly

I would like to propose adding a placeholder of "h:mm" in the hours field to indicate the expected time format. While Redmine supports various time entry formats, “h:mm” is certainly the most common. Displaying this format as a placeholder could help users understand the expected input more easily and improve overall usability.

This can be implemented with the following change:

diff --git a/lib/redmine/views/labelled_form_builder.rb b/lib/redmine/views/labelled_form_builder.rb
index 8c97b8215..f364ca8e2 100644
--- a/lib/redmine/views/labelled_form_builder.rb
+++ b/lib/redmine/views/labelled_form_builder.rb
@@ -49,6 +49,7 @@ class Redmine::Views::LabelledFormBuilder < ActionView::Helpers::FormBuilder
     # display the value before type cast when the entered value is not valid
     if @object.errors[field].blank?
       options = options.merge(:value => format_hours(@object.send field))
+                       .with_defaults(:placeholder => 'h:mm')
     end
     text_field field, options
   end

Setting the target version to 6.0.0.

Committed the patch in r22977.