You have the possibility to edit the sleep data tracked by your Sleep / Sleep Analyzer in the Withings App. To do so, perform the following steps:

1. Open the Withings App.
2. Tap on a sleep measurement in the Home or Measure tab.
3. Tap on the three dots at the top right of the screen.
4. Select Edit my night.
5. Tap on Fell asleep at and/or Woke up at to update your sleep data.
6. Tap Save to confirm.

Note: Sleep data measured by activity trackers can be edited in the Withings App as well.