I wondered if the letters were inadvertently put back to front for this. 1st November is All Saints' Day, sometimes shortened to All Saints but is it ever referred to as Saints' Day?
Glad someone has come up with answer for November 1st - knew it had to be something Day and all I could think off was All Saints Day but without the first word.
It's All Saints Day as far as I'm aware and I don't think it tends to get abbreviated - I did wonder if the compiler had made a mistake and should have put (3,6,3)