It may be in style to party at 5 p.m. and head to bed by 9 p.m.—according to Gen Z, anyway. You can't make it through a TikTok scroll without seeing someone's early bedtime routine video ...

They, on the other hand, are free to decide when they go to sleep. Some nights, they head to bed at a reasonable hour. Other nights, they push it too far and wake up regretting their life choices.

Despite this, a 2013 report from The Sleep Council found that almost half of us go to bed after 11pm, while a mere 10% of us are under the sheets between 9 and 10pm. “In big cities, the ...