Why we have leap year

It's the most logical explanation I've heard .

The other day I was looking for a thank you card. I picked up a single Valentine Day card. It said, "Love makes the world go round."
From across the table, Gluten looked up and spoke very quickly. "Running makes the world go round." THen popped his head back down to where his nose was almost resting on his bowl of cereal.
"WHAT?"
"Running makes the world go round!" he grinned.
"A lot of people are running in the wrong direction."
"That's why we have leap year."

He gave that irristable ear to ear grin.