Ahead of schedule, Microsoft has started rolling out some of the new Fluent system icons to users running Windows 10 1909.

Earlier this month, Microsoft announced that they had rolled out new icons for the Mail and Calendar apps to Windows 10 insiders and that current Windows 10 builds would receive them over the coming months.

Microsoft appears to have moved up their plans as BleepingComputer has seen new Fluent-based icons in Windows 10 1909 for the Calendar, Mail, File Explorer, Your Phone, and OneDrive apps.

Rolled out Fluent icons to Windows 10 1909

The new Windows 10 system icons utilize Microsoft's Fluent Design System, which is supported in Windows, iOS, Android, and web applications so that developers can create user interfaces and icons that are the same for every platform.

"The addition of color also gives a cohesive design language across platforms: the icon that’s familiar in Windows 10 is the same on Android, iOS, and Mac, providing a wayfinding path across your digital life," Christina Koehn, Principal Design Director at Microsoft, explained in a blog post. "The new rounded corners across the Windows 10 interface achieve the same goal: making these icons feel like they live in the real world; something familiar and approachable to grab onto."

The full gallery of Fluent icons created to replace existing Windows 10 system icons can be seen below.