Windows 10 will move to a new codename format like 19H1, 19H2

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Windows 10 will Move to a New Codename Format like 19H1, 19H2

30 March 2018 John Weaver Senior Program Developer

Last update by Emma Johnson at 9 November 2026

Summary
Inner code of Windows 10 will adopted new formats like 19H1, 19H2, 20H1 and 20H2 which are intuitive.

During the development of Windows 10, its codename are so simple. The first version released in July, 2015 was named to be “Threshold 1″. The next one was “Threshold 2″. Then codename “RedStone” was adopted. And the upcoming Spring Creators Update will be codednamed Redstone 4.

And the Redstone 5 released in Autumn this year will be the last Windows 10 update to feature the Redstone codename. Then Microsoft will be moving to a new and intuitive codename format like 19H1, 19H2, 20H1 and 20H2.

Actually, this codename is similar to the naming format of Windows 10 version which is release year + month. Like the upcomping version is 1803 which means March, 2018 and Xbox is 1804 which stands for April,2018.

Tips:

The naming format of Renee software are similar to Microsoft. We adapt date to be the codename. Let’s take the lastest audio recroding software – Renee Audio Recorder Pro as an example. The latest version is 2018.03.28.47.