
Microsoft also will likely begin rolling out the server complements to the October 2018 Update - Windows Server 1809 and Windows Server 2019 - on the same day in October as the client build goes live. The October 2018 Update rollout will likely be staggered, as in past feature releases, with machines known to be able to best handle the new bits getting them pushed to them first. The Windows 10 Fall Creators Update, a k a Windows 10 1709, starting rolling out to mainstream users on October 17, 2017. The Windows 10 April Update began rolling out on April 30, 2018.

Microsoft officials didn't specify today on exactly which day in October the October 2018 Update will start rolling out.

After Microsoft officials select a build as "final," they continue to patch and update it and typically roll out both the final build and a cumulative update (or several) to mainstream users starting the following month. Specifically, those builds this year were known as "1803" (for the March, 2018, date when the code is RTM'd) and "1809" (for the September 2018 RTM date). I say this isn't a surprise because a year ago, Microsoft officials said that they'd be rolling out the twice-yearly Windows 10 feature updates in the spring and fall of each year. Microsoft will finalize the specific build it will designate as the October 2018 Update in the coming weeks.

It's not much of a surprise, but Microsoft made it official today: The next Windows 10 feature update, codenamed "Redstone 5," will be known as the Windows 10 October 2018 Update.
