Monday Madness.

Using the letters in the word 'AUTUMN' describe your favorite season.

I'm drawing a blank here.

TAN leaves.
NUT(s) on the trees, squirrels harvesting.

Oh wait, I just peeked at someone else's answer. *sigh* I really messed up.

My favorite season is Spring, which would be:

An Unusual Time Under Mellow Nights.