We all have stories like your day, when we learned it was better to quit and start again a new day.

Here's mine:

I made a gorgeous wall hanging, about 60" square. After mitering the last border, I used my rotary cutter to cut off the excess. Unfortunately I didn't get the border out of the way and I sliced right through it. So I picked it out and cut another one.

When trying to miter the second try, I couldn't get it to work. Then I realized I had cut the border 1/2" too narrow. So I picked it out and cut another one.

When sewing the third try, I got to the end and I had not left enough on the end for the miter.

I said several words I will not repeat here, then went to bed.