So the study of how light and biology interact is called chronobiology: * https://en.wikipedia.org/wiki/Chronobiology https://en.wikipedia.org/wiki/Chronobiolo

So the study of how light and biology interact is called chronobiology: * https://en.wikipedia.org/wiki/Chronobiology https://en.wikipedia.org/wiki/Chronobiology AFAICT, all national (US, CA) and international (EU) chronobiology societies, as well as many sleep researchers, state that from a health perspective we should (a) get rid of the twice-yearly time switching, and (b) stay on Standard ("winter") Time year-round: * https://srbr.org/wp-content/uploads/2018/10/SRBR-Statement-on-DST.pdf https://srbr.org/wp-content/uploads/2018/10/SRBR-Statement-o... * https://esrs.eu/wp-content/uploads/2019/03/To_the_EU_Commission_on_DST.pdf https://esrs.eu/wp-content/uploads/2019/03/To_the_EU_Commiss... * http://www.chronobiocanada.com/official-statements http://www.chronobiocanada.com/official-statements * https://sleepresearchsociety.org/wp-content/uploads/2022/11/zsac236.pdf https://sleepresearchsociety.org/wp-content/uploads/2022/11/... * https://jcsm.aasm.org/doi/10.5664/jcsm.8780 https://jcsm.aasm.org/doi/10.5664/jcsm.8780 * https://www.frontiersin.org/articles/10.3389/fphys.2019.00944/full https://www.frontiersin.org/articles/10.3389/fphys.2019.0094...