I heard somewhere that the hours of sleep we get before midnight count as double.
Although not scientifically accurate—the first few hours of sleep are typically deep sleep, which is considered the most restorative—I think there is some second-order benefits to going to bed before midnight.
Many of us have commitments early in the morning, so after-midnight bedtimes likely mean that on average we’ll get fewer hours of sleep. So sleeping before midnight helps increase the window of available hours to hit the amount we need.
I often write about habits that I’m personally working to get better at. This is one of them.