resetA 16:8 schedule describes a 16-hour fasting window followed by an eight-hour eating window in a regular 24-hour cycle. Noon to 8 pm is one possible eating window. It is not the definition of 16:8, and it will not suit every routine.
Three example timetables
| Eating window | Fasting window | Following endpoint |
|---|---|---|
| 9 am–5 pm | 5 pm–9 am | 9 am next day |
| 11 am–7 pm | 7 pm–11 am | 11 am next day |
| 12:30 pm–8:30 pm | 8:30 pm–12:30 pm | 12:30 pm next day |
These are clock calculations, not endorsements of any meal timing. They assume no daylight-saving transition.
To check the middle example, count five hours from 7 pm to midnight, then 11 hours from midnight to 11 am. Together that is 16 hours. Keeping the minutes is important: 7:30 pm to 11 am is only 15 hours and 30 minutes.
Start with your least flexible meal
If a family dinner finishes at 7:30 pm, an eight-hour eating window ending there begins at 11:30 am. If breakfast must happen at 8 am, the corresponding eating window ends at 4 pm. That may make the routine impractical.
Write down work breaks, meals and other commitments before choosing a target. A timetable that looks simple on a diagram can be awkward in an actual household. It is reasonable to decide that another approach fits better.
A preset does not assess suitability
Reset offers a 16:8 preset to make recording easier. It cannot decide whether you should use it or whether meals within that window meet your needs. Read the safety context and discuss dietary changes with a qualified clinician.
The timer also cannot confirm ketosis, fat loss or autophagy when 16 hours appears on screen. It records elapsed time.
Keep planned and actual times separate
Use the schedule calculator for the plan, then record what really happened. If breakfast happens earlier, end the session then. If you forgot to start the timer, correct the start time rather than shifting the rest of your day to match an inaccurate countdown.