Nursing rosters break most sleep advice, because the advice assumes a fixed schedule. Three nights on, four off, then a run of days is not a schedule your body can settle into. The goal is not to fully flip. It is to move your lowest hour out of your shift and hold it there.
WHAT THIS PAGE WILL NOT TELL YOU
This page explains how the timing works and why. It does not print your six times, because they are not printable: they move with your finish time, your commute and the hour you wake with no alarm. Four questions, about forty seconds, no account.
- Your crash window
- Bright light: start and stop
- Sunglasses on: start and stop
- Main sleep: in bed and up
- Pre-shift nap: and when to set the alarm
- Last caffeine
FREE TO SEE YOUR CRASH WINDOW · NO ACCOUNT · 40 SECONDS
You are not trying to become a night person
Flipping all the way takes longer than most nursing blocks last, and your days off would undo it anyway. Aim to move your worst hour by two to four hours. That is enough to put it after handover instead of during it.
Everything below is the mechanism. The six clock times it produces depend on your finish time, your commute and how early you wake unaided, so this page cannot print them. Get yours in about forty seconds.
Days off are where the plan is won or lost
Flip all the way back to days and you pay the whole cost again next block. Instead, keep a fixed four-hour block of sleep that works for both schedules. You get your days off without starting from zero every time.
The handover hour is your highest-risk hour
Medication errors and needlestick injuries cluster in the last hours of a night shift. That is exactly where your worst hour sits if you have not moved it. Moving it is a patient-safety question, not just a comfort one.
Common questions
+ − Should I flip my sleep on days off?
A full flip costs you the adaptation you spent the week building, and you pay for it again on the first night back. Most people on permanent nights land on a half flip: sleep after the last shift, get up mid afternoon, then go to bed a few hours earlier than your work week bedtime. Which one is right depends on whether your days off are worth more to you than an easier first night back.
+ − Is it bad to nap before a night shift?
No. General sleep advice tells people not to nap during the day, and expert consensus for shift workers specifically rejects that. A nap ending about an hour before you clock on reduces sleep debt going into the shift. Set an alarm, because past 20 minutes you risk waking up groggy and need the full 90 to come out of it cleanly.
+ − When is my highest risk hour on a night shift?
The hour either side of your low point, which on nights is usually somewhere between 4am and 6am. That tends to collide with handover and with medication rounds. If you have any say over when the tasks needing most care get done, move them off that window.
+ − Should I give up caffeine to sleep better after nights?
No, but move it. Caffeine has a half life of about five hours, so a coffee at 5am is still working on you at 10am when you are trying to sleep. Front load it. Caffeine at the start of the shift is worth more than caffeine at the end, and the last dose should land roughly six hours before you plan to sleep.
What this is based on
Every rule the plan runs on, and where each one comes fromRelated
ShiftDawn is a scheduling and education tool built on published circadian research. Not medical advice, not a diagnosis. If you suspect a sleep disorder, see a clinician.