I must admit I've never heard of this saying...but having spent most of my life in Australia where the seasons are the opposite of here in the US it wouldn't have much meaning in Australia where March is the end of Summer and the beginning of Autumn.
March is such an unusual weather month here in New England...one day it can be freezing, the next day warm and sunny and the next day snowing...like it is this morning! Thankfully by the end of March the weather settles down, things begin to green and get pretty which makes me very happy which is why I chose this very happy lamb for this challenge!
Stamps - Lamb by Azadi Earles and sentiment from Unity KOTM December 2009
PTI white cardstock
SU coloured cardstock