If I wanted to do something like that, I would use separate events (or utilize the "OrIf"):
If time is sunrise - 30
AndIf Virutal switch Season = Winter
OrIf time is sunrise + 30
AndIf Virtual switch Season = Summer
Then....
If time is sunrise - 30
AndIf Virutal switch Season = Winter
OrIf time is sunrise + 30
AndIf Virtual switch Season = Summer
Then....
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