To find out why a day is non-compliant (NC) head over to your HoR Month Review page and click on the NC day in the crew member's calendar.
Once you've opened a day, you'll be able to see what NC was raised and the timeframe in which it occurred.
The non-compliances will be shown in the summary tab in a bullet list
If multiple non-compliance are found, they will all show in the bullet list
The timeframe in which the non-compliance is found will be shown on the right hand side
To find out more about non compliances, head to: