This seemed obvious when Microsoft announced the 'Anniversary Update' - but a report says company sources have confirmed that it will be released around the first anniversary of Windows 10's launch.
The fourth major milestone for Windows 10, Redstone 2, has been delayed until early 2017. The release is slated to coincide with hardware releases from Microsoft. Redstone 1 is still slated for June.
Previous reports indicated that Microsoft would deliver its Windows 10 Redstone updates in two waves this year - but while RS1 is said to be on track for June, RS2 has reportedly been 'pushed back'.