tmcgahey's solution works just fine for a flex daily schedule - I do the same thing.
In his case, nothing will happen all Wed. long - midnight to midnight.
Sometimes, during a lengthy dry period, some zones may go more dry than desired. The flex daily schedule will correct for this the next day. With the way flex daily scheduling works today, you would not want to exclude too many days, and, you wouldn't want to exclude multiple consecutive days.