We don't need anymore Bank holidays around April and May. Well unless they plan on dropping one in substitute. I always think the end of August upto Christmas is a long trek without a break. I'd rather have a Bank holiday around Thanksgiving, but as a share event to others, rather than family, ie donate food. It would be a good reminder to people before we take up feasting less than a month later...like we use to do at school, donating food.
Harvest Festival? We used to do that when I was in junior school in our local area (not a day off school but an event where we'd donate, etc). Usually early October i think.