Why can a new entry to my sleep journal not be saved?

Please consider the following points when using the sleep journal.

Don't forget to save your data. When you enter your sleep data, please be ware that they are not saved automatically. Please click the "save" button once time. You should subsequently receive a confirmation that you entry was saved succesfully. 

If you forgot to add an entry into the sleep journal, the corresponding field will be highlited orange. Please add the missing sleep journal entries while paying attention to the associated note.

The times are registered in a 24h format, with the hours and minutes separated by a colon. 

You can not save data from a future date in your sleep journal. 

Make sure you have the latest version of your operating system installed on your device.