https://wccftech.com/windows-10-rs5-preview-build-17686/

Windows 10 Redstone 5 development is going in full force. Microsoft has just released a fresh new build to Windows Insiders in the Fast ring and Skip Ahead. Windows 10 RS5 Insider Preview Build 17686 brings some improvements and general fixes to the Insider community. Here are all the details. [Not in the Insider community? Head over here to install the most recent Windows 10 feature update]

We have introduced a new Region page that allows overrides to default regional format settings such as Calendar, First day of the week, Dates, Times, and Currency. Please go to Settings App – Time & Language – Region and give it a try.