When I have added a custom holidays it, the tasks run right through it how do i make it so that the tasks will not work on those days?
Holidays are not working, they are not counted against the task durations, unless you explicitly changed their type to “working” or “neutral”
… but then, if I mark the holidays as “working”, they will not appear on the chart as special days at all… 
Hmmm If I have correctly understood… seems you’re talking about weekends; I am asking for specific entered holidays. Would these latter be shown?
