Amazing. In a haiku you always want a "time frame" and here it's uniquely different. You have the same but in reverse. And honestly it is true both ways. When a season first starts it seems slow but as it goes on... It's faster and faster. My favorite word here is executes. You rarely see that used in poetry. But it kinda rings true. Heat does take away cold and cold does take away heat. To me an execution happens within the blink of an eye so in that you used it well because that is what you meant by that. Seasons pass by so quickly that you they are barely there to enjoy. Great!