Korf: Spring is a time of hope

Spring has finally arrived. I spent the weekend making multiple trips to Home Depot for plants, flowers, mulch and earth and, despite sore muscles from planting and digging, I feel fabulous.
What is it about spring that makes us feel so good? Is it the warmer days and longer evenings? The fact that we are more active, spend more time outdoors and see more of our friends and neighbours? 
Scientifically, there is a relationship between good weather and happiness. More light tells the brain to