Cheating is not an option if I want to know when and how sun enters the living room.
True – but only a very small percentage of the projects presented here (@ the gallery) are dealing with real life, compared to those being about making good renderings.
But unless you tell me otherwise, I suspect that rendering does not take equation of time into consideration.
Probably not – but you don't need a weatherman to tell which way the wind blows... ?
Short version is that "..women use an egocentric spatial frame of reference.". So there! 
Yes! And you should try it!
Using steady landmarks to navigate, we can dash happily into the swampland and look for cloudberries, without fearing that a sudden overcast( or the equation of time) will lead us astray on our way back home.
Cec
