Look at a day when you are supremely satisfied at the end. It's not a day when you lounge around doing nothing; it's when you've had everything to do, and you've done it.

Margaret Thatcher

to me this quote means means that a fulfilling day is when yu do have something you had all the time in the world and you took advantage of it. you actually managed your time and got everything done i alo thiink that when you have time left over to do what you want is when the day is super satisfying.