Sleep Schedule
Sleep Schedule for 7pm-7am (3 on / 4 off) Shifts
The most common 12-hour night shift pattern for hospital nurses. Three consecutive nights followed by four days off.
Your Recommended Schedule
| Time | Activity |
|---|---|
| 7:00 AM | Shift ends. Drive home (blue-light-blocking sunglasses). |
| 8:30 AM | Target sleep start |
| 3:30 PM | Target wake time (7 hours) |
| 1:00 AM | Caffeine cutoff (no caffeine after this) |
| 5:00 PM | Pre-shift nap (20-30 min) |
| 7:00 PM | Shift starts |
How This Schedule Works
The sleep window is calculated based on your shift end time plus a90-minute buffer for commute and wind-down. Most nurses working 7pm-7am (3 on / 4 off) shifts find that falling asleep within 90 minutes of arriving home gives the best results.
Waiting longer risks a “second wind,” where your circadian drive toward wakefulness overcomes your sleep pressure, making it harder to fall asleep even though you are exhausted.
Caffeine Strategy for 7pm-7am (3 on / 4 off)
Your calculated caffeine cutoff is 1:00 AM. This is based on a standard 5.5-hour caffeine half-life. By your target sleep time of 8:30 AM, caffeine will have dropped to approximately 25% of peak levels, which is low enough for most people to fall asleep.
Use our caffeine calculator for a personalized cutoff based on your sensitivity.
On Your Days Off
After your last shift, sleep from 8:30am-1pm (short block), then go to bed at 9-10pm that night to start transitioning back.
Get this schedule automatically
ShiftNight builds this schedule for every day of your rotation, adjusting for your actual sleep data and preferences.
Try ShiftNight FreeFAQ
For 7pm-7am (3 on / 4 off) shifts, aim for 7 hours of sleep starting around 8:30 AM. A solid 7-hour block is better than a longer fragmented sleep.
Yes, a 20-30 min nap around 5:00 PM before your shift can significantly improve alertness during the first few hours.
Eat a light meal within 30 minutes of arriving home (before 8:30 AM). Avoid heavy meals close to your sleep time. Have your main meal after waking at 3:30 PM.
Common Questions
How many hours should I sleep after a night shift?
Research-backed answer with practical strategies
When should I stop drinking caffeine on night shift?
The caffeine half-life math, explained
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