Should I still shop on Boxing Day, if my friend already gave me what I was planning to buy as a Christmas gift?

I always get this food item on Boxing Day but my friend already gifted it to me around 5 days before Christmas. My dad says I should not get a third box since it is fatty and high calories, but I thought, it is the only time of the year it is at 20-80% off.

Should I still shop on Boxing Day, if my friend already gave me what I was planning to buy as a Christmas gift?
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