They are both federal holidays and since I live in Ottawa and hubby is military (federal government) then I explain that I am closed the same days he is. Also they are in there because anyone that works for the federal gov. gets them off and therefore why should I do care while they get a paid holiday.
What I do is work individually with anyone that does not get those days. Depending on how much I like them, how cooperative they have been with things I needed, how old the child is ie how long they nap, how well they play, etc. I might be available to help them out for an additional fee for working on a holiday but it gives me control.