Seek low solar angle sunlight early and late in the day, and bright light throughout the day.

“you're looking for those yellow blue or blue pink blue red contrast and on cloudy days believe it or not they're still there just you don't perceive as much of it coming through”

“so that's three things that we should all strive to do view low solar angle sunlight early in the day view solar angle sunlight later in the day and get as much bright light in our eyes as we safely can ideally from sunlight throughout the day”