Why do we have birthday party blowing out candles?

On his birthday, the children always like to sit with their parents, relatives and friends, then blowing out a candle with the number of his old plug on the cake, and sing happy birthday. Finally the cake is cut and divided people.

Why the pumpkin is the symbol of Halloween?

Halloween festival is widely celebrated and decorated in the second largest festival in the U.S. and many countries around the world. There are things that you will never see the absence of which is Halloween pumpkins. So why is carved pumpkin (pumpkin-carving) into ghostly shapes was considered the most characteristic symbols of the festival?