Spring
When you see the spring sun you know it's finally the spring season.
The spring sun only comes out in spring, which is why you know for sure it's spring. Imagine a different looking sun that only comes out in spring but not the other seasons.
しゅん
はる
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When the spring season comes around, it makes you want to laugh: "HAR (はる) HAR HAR!" you yell.
Go ahead and belt out a few "HAR HAR HARs" for spring. It's warming up, everything is coming to life, and you're happy. "HAR HAR HAR!"