I come in varieties of color and am found almost year round. My house is tall and my only fear is the cold. What am I?

Question

I come once a year, a day of cheer,
A time to laugh and not to fear.

My jokes are many, and some are bad,
But they're all in fun, so don't be sad.

I'm not a holiday, nor a festivity,
Yet I'm celebrated with much levity.

What am I?

Answer 1

A leaf is the answer