Time and Date website shows **12 hours 3 minutes** of daylight in my hometown, Calgary, AB, Canada.
[https://www.timeanddate.com/sun/canada/calgary](https://www.timeanddate.com/sun/canada/calgary)
In: 2
Because sunrise/sunset aren’t defined how you think
On the equinox, the sun should be above the horizon for 12 hours intuitively, but we didn’t define sunrise/sunset in a way that results in that(by the middle of the sun crossing the geographic horizon)
Sunrise and sunset are defined as when the first and last bit of the sun cross the visible horizon. The sun is 16 arc minutes in radius, and the atmosphere refracts the sun up by about 34 arc minutes so sunrise is actually when the center of the sun is 50 arc minutes below the horizon so instead of sunrise and sunset being 90 degrees around the circle from solar noon they’re 90.83 degrees around
The end result is that both Calgary Canada and Melbourne Australia can receive more than 12 hours of sunlight on the same day.
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