This didn't work for me. The example in your post, as currently displayed, is:
{time: LL; shift=7D(skip=SAT, SUN)}
I tried the following:
{time: MMMM Do, YYYY; shift=1D(skip=SAT, SUN)}
and got this result:
[Error - Invalid time shift "1D(skip=SAT, SUN)"; the proper form is "[length][unit]" like "2s" or "1Y".]