Answer :
its a tradition to some people
To make your own pumpkin mat you will need at least one pumpkin or squash, a sharp knife, and a place to hang it from. Almost all of the sources that I have read refer only to the use of pumpkin in regards to this method, but I have found that butternut squash works well too, although it is more challenging to cut up
Pumpkin is used to make soups, desserts and breads, and many Americans include pumpkin pie in their Thanksgiving meals. Carving pumpkins into jack-o'-lanterns is a popular Halloween tradition that originated hundreds of years ago in Ireland.