When the schedule slipped. Shift work, jet lag, weekend lie-ins, and the sleep you are already behind on.
A tool for thisBedtime Calculator

Move your sleep schedule earlier without cutting sleep. A week-by-week plan for night owls, with readiness checks, light and meal timing, common setbacks, and weekend rules.

Six sleep timetables for third shift, 12-hour nights, and rotating shifts, plus the hours each shift name covers and how to sleep after a night shift.

After an all-nighter, take a 20- or 90-minute nap before 3 p.m., then keep your normal bedtime. Quick tables for today, tonight, and the days after.

The common guideline is 10 to 20 minutes, finished before about 3 p.m. — and later if you go to bed late: 10 p.m. bedtime by 2 p.m., midnight by 4 p.m. Compare 10-, 20-, and 30-minute naps.

SAVERS at 6, 10, 20, 30, and 60 minutes, side by side. See how to split each step, the 5 AM Club difference, and pick the length that fits your morning.

Sleeping in on weekends can shift your body clock: social jet lag, not travel jet lag. Estimate the shift and ease it with wake times, light, and naps.

About 4 days per lost hour, from a 2016 study. See how recovery differs after an all-nighter, a week of short nights, or chronic short sleep.

About one day per time zone: 3–5 days for 4h, 4–7 for 6h, 7–12 for 9h. Eastbound trips take longer to recover. Four steps to reset with light, meals, and sleep.