Holiday Setting with Professional Plan

We can use work schedule function with the professional plan, but cannot set additional holiday now.
I hope we can set holidays flexibly with the current plan.

We have many tasks, and set the due date and more automatically in Wrike.
The function is so useful for us, but we have to do additional works before every holidays.
Considering holidays, we check all tasks and adjust manually. 
(PTO setting for team members won't be needed.)

If any, don't hesitate to ask me.