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Does the vernal equinox (start of spring) really have exactly 12 hours of daylight and 12 hours of darkness?

6News meteorologist Matt Elwell says: “That is the idea, but it rarely works out that way. Because of the geometry of the Earth and sun, seeing exactly 12 hours of daylight is rare on the vernal equinox. Sunrise is defined as the moment the top part of the sun appears to peek over the horizon and sunset is when the last bit dips below the horizon. The Earth’s atmosphere also bends sunlight when it’s close to the horizon, making the sun appear to rise before it actually does.”

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