Its bedtime… your phone says so!
If you have upgraded your iphone to iOS 10 you may have noticed an extra little feature on the alarm clock called ‘Bedtime’. This is a feature of the phone that can help you regulate your sleeping patterns, which apparently is a good thing..
anyway, if you are wondering about this and want to find out how it works and how to set it, there is a good article on Mashable that explains everything for you.