Happy Solstice!

[SheHateMe]

Ah, McDonald's then.

They're two doors down

 

[Red Squirrel]

Guessing when the sun first breaks the horizon and last disappears over the other horizon. What you see prior to that is from sun light diffusing in the atmosphere.

Hmm that would make sense, so it's probably based on when the sun itself is actually visible. That way it's a constant figure to go by.