So, if you're flying westbound under the VFR at the day's end, planning to arrive at your destination AD not more than 10 mins before last light, la, la, la and all the rest of it, how are you supposed to determine whether the sun glare at any given time during your journey is going to reduce visibility to below VMC?
And even if it does, what the law implies is that you're supposed to land as soon as 'practicable' once you find yourself in that predicament?
Right.
520.