“The pandemic presented an unusual opportunity for people to get a sense of their own circadian preference, resulting in some Australians sleeping better.”

Take a look at the article here: https://www.smh.com.au/lifestyle/health-and-wellness/how-your-internal-body-clock-affects-sleep-quality-each-night-20201120-p56gdq.html?fbclid=IwAR0swgARWaGYBTSFBIeQ3xkdm4DLN2rMOElz0qbCr1k4aXoeykXukMutSbo