Dreary Mondays on a Friday?

Who knows where the name came from?! It's a Friday afternoon and I'm actually watching my daughter dance naked (with a purple scarf flowing in the air) to Mary Poppins. Not so dreary... but Mondays can be, start of a new work week after the weekend spent with family, the start of the new school week with a new (usually gigantic) load of schoolwork, being all too certain there will be no chance of sleeping in for at least five days (soon to be six when I start fall term with a class on Saturday mornings), plus I live in the Pacific Northwest where nine months of the year Mondays are usually dreary (along with Tuesday thru Sunday). Anyways, it's just a name don't read too much into it.