Its an umbrella
When I am open, I protect you from sun and rains.
When I am closed, I provide support while you walk.
I come in different colors and sizes.
What am I?
What is closed during the day, and open at night. But you can always use it.
I am usually seen at Christmas, but I am not a stocking or a bell. I am red and white in colour and shaped a bit like the letter L. What am I?