Set Alarm for 11:40 PM

If you work the night shift, a 23:40 alarm is essential for managing an unconventional sleep-wake cycle. Unlike day workers, you cannot rely on natural light as a cue, which makes external alarms your primary tool for staying on schedule.

Set your 23:40 alarm with a high-volume, hard-to-ignore sound, and consider pairing it with a vibrating wearable device. Night shift workers often sleep in environments with ambient noise, so choose an alarm tone that cuts through background sound without being disorienting.

Some people do their most creative work at night, when the phone stops ringing and the world goes quiet. If you are a night owl who thrives at 23:40, an alarm can help you structure creative sessions so they do not spiral into all-nighters.

Set a 23:40 alarm as your creative start time and another alarm 90-120 minutes later as your stop signal. This bounded approach harnesses the focused energy of late-night hours while ensuring you still get adequate sleep. Protect at least six hours between your stop alarm and your morning commitment.

Paradoxically, one of the best uses of a late-night alarm is reminding yourself to stop being awake. A 23:40 alarm labeled "Go to bed" interrupts the autopilot scrolling, reading, or TV watching that keeps millions of people up far later than they intended.

When the alarm sounds at 23:40, begin your final bedtime sequence: brush your teeth, set out tomorrow's items, and get into bed. Treating bedtime as a scheduled event rather than something that happens when you feel tired enough is one of the most effective sleep hygiene improvements you can make.