Hi @Ryzan99 - So, unfortunately, when setting public holidays, it won't reflect in a user's time off calendar. However, on a user's profile you can assign them to a schedule (where the public holidays are set). Then, when they are pulled into resourcing views it is accounting for their personal time off and the schedule that was applied to their user profile.
It is a confusing experience though, I believe there are some ideas posted that might be worth an upvote to have improved in the future.