When you realize you’re in “good days” the feeling is called bittersweet. Therefore one should make the most, as soon as you realize the time is bittersweet. This helps prevent regrets of “not doing enough” later. Like today, it’s not too late to make the most of your upcoming weekend.
Hardy Fox of The Residents tells a great personal story about the exact sentiment expressed in this meme:
The Residents - Life Would Be Wonderful
The story is told at about 2m40s in.