For a theoretical perspective of how much your clock can be "phase shifted" as a function of the period of your internal clock, check out this nice paper from s

For a theoretical perspective of how much your clock can be "phase shifted" as a function of the period of your internal clock, check out this nice paper from scientists in Berlin: The theory is basically thinking of humans as coupled oscillators that are entrained by sunlight. https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0059464 https://journals.plos.org/plosone/article?id=10.1371/journal...