It's been going on for thousands of years. Seems to me when Abu Simbel was relocated up the hill a bit so it wouldn't be flooded by Lake Nasser planners were careful to make sure this illumination wasn't harmed. It got set back day, that's all.
In housekeeping news I've turned off that infernal word verification nonsense. Or I think I have. If it is still there, please let me know so I can do something about it.
--Thank you, the Management