Q: Do not disturb NOT WORKING

See if this article helps:

Use Do Not Disturb on your iPhone, iPad, or iPod touch - Apple Support

If not try a Forced Restart. Hold down the Home and Wake/Sleep buttons at the same time for about 15 seconds until the Apple logo appears. You will not lose anything.

If a forced restart does not help try a System Restore. First backup your device using iTunes. Also import your photos to your computer and copy all important data. Try restoring from backup first and testing it. If it does not help, you may have to restore as New and reconfigure from scratch as the backup could be corrupted. For this reason it is important to have your photos and data saved separately from the backup. Here are the steps for a Restore:

https://support.apple.com/en-us/HT201252

What does "the moon is still gray" mean? Can you post a screen shot? Also, what exactly are your Do Not Disturb settings?

That icon in the Status Bar just means that it is turned on (which your screen shot confirms). In addition, you have it set to function only when the screen is locked, meaning you will still get notifications when the screen is active.

These might be helpful:

Use Do Not Disturb on your iPhone, iPad, or iPod touch - Apple Support

http://help.apple.com/iphone/9/#/iph3dd60e1f