If you're part of the Windows Insiders Fast Ring (or have opted to skip ahead), you'll find the Windows 10 Insider Preview Build 17074 available to download. Of note is the addition of customizable scheduling for Quiet Hours, which functions similarly to the Mac Do Not Disturb feature. Instead of the fixed 12 am and 6 am period in the earlier version, you can now set your desired hours for only receiving notifications from people and apps in your priority list. The updated feature will also automatically switch on when you're playing full screen DirectX game and when you're duplicating your display.
There are quite a few other improvements included in this build; many focus on the reading experience within Windows 10. There are new grammar tools for both EPUB books and Reading View on websites. Additionally, Microsoft Edge has a new look for reading across EPUBs, PDFs and other documents, as well as syncing reading progress and notes across devices. The build also includes support for custom audio in EPUB.
The build adds an option to never save passwords for a domain, which was highly requested feature among Windows Insiders. It also allows for autofilling passwords and using extensions when using InPrivate mode. Additionally, fixes were put in place to make Near Share more reliable. You can see the full list of improvement at the Windows 10 blog.
Update: This article has been corrected to reflect that the new additions here are the automatic rules for "Quiet Hours," rather than "Quiet Hours" itself.