The oldest UFO I ever finished was 20 years old. I started it in 1984- my 1st quilt, all triangles (!!?!!)cut the blocks out with scissors, pieced them using 1/2 inch seams & put them away for 20 years! When I became interested in quilting I decided to finish the quilt, cut off a lot of points squaring up the blocks, used some nice quilting flannel on the back, practiced my FMQ on it for the 1st time & it is now an unattractive, warm, much used quilt!