Are there special Field Ministry arrangements for July 4th and Thanksgiving? Or have they been quietly ditched like the Christmas and New Year's Day arrangements?
And not forgetting Bank Holidays. You were never supposed to have a day off.
Re Thanksgiving: Looking from the outside as I live in the UK, what is the objection to this holiday? Is it considered religious? If you were PIMI, logic would dictate that Jehovah directed events to ensure that the nutjob Pilgrims would survive that first winter, thus setting in motion the chain of events that led to the Constitution and the guarantee of freedom of worship which fostered the setting up of the WTBTS.
I say go ahead and celebrate!