Welcome to Day 5 of Upworthy's 31 Days of Happiness Countdown! If this is your first visit, here's the gist: Each day between Dec. 1 and Dec. 31, we're sharing stories specifically designed to bring joy, smiles, and laughter into our lives and yours. It's been a challenging year, so why not end it on a high note with a bit of laughter? Check back tomorrow (or click the links at the bottom) for another installment!

Today's countdown calendar treat combines two of the internet's favorite things — nostalgia and cats — in a truly beautiful way.

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