I have also planned other work around people who wanted the job done on a particular day. I like to be flexible, but also appreciate people working with my needs too.
Today here in the good old emerald isle, it's St Patrick's Day, a national holiday. I am working today as normal, and I have told customers who are planned today that I can do them as normal, but if they want to leave it, it's fine but I won't be back until next month. I have more work than I can cope with today so a few 'not todays' will be ok.
Most have fallen into line so far. One whose I won't be able to do has been offered (and accepted) Easter Monday as an alternative, which surprised me. (Here in Ireland nobody wants to see us windys on a bank holiday).
John