I often go only 4 or 5 days with the zest in the alcohol. It depends on whether I make it when I get home or just before leaving (if at that point, it sits for weeks bwfore being strained out). I do not see a large enough difference between a many-day maceration and a maceration for longer, not enough to necessitate it. I go longer if convenient (which, if I set it up before I leave the ranch, it is as I have no choice).
I strain out the zest then mix in the syrup, bottle, and allow to mellow a few days before consumption. I do not find that weeks in the bottle makes a big difference either. There is slight softening of the volatiles but nothing that ice and/or a splash of water can't handle on their own, sooner.