Weekend and holiday overtime

I'd love to see the ability to specify overtime for Saturday's and sundays as well as holidays.

My pay scale is
weekday first 8-1.0, 8-10 is 1.5 rate, and after 10-twice rate

Saturday is first 10-1.5 rate and after that double time

Sunday is double time all day.

I would love to be able to add this rule.