Support for the Windows 10 operating system version 1903 will end on December 8, 2020 for all supported editions. Windows 10 version 1903 was released as the first feature update for 2019 on May 21, 2019.
Since it is the first feature update release of the year 2019, its support lifecycle was set to 18 months for all editions. Home customers get 18 months of support regardless of the feature update that is installed; this is not the case for Enterprise and Education customers, as these get 30 months of support for the second feature update of the year.
Windows 10 version 1903 support ends on December 8, 2020. Security patches will be provided on the day but no additional patches or support are provided after the date. Windows administrators have several update targets when it comes to keeping devices with the operating system version supported.
Windows 10 version 1909 and Windows 10 version 2004 are available currently, but Windows 10 20H2 will be released this year so that it could become a target as well. Microsoft recommends to upgrade to the latest version of Windows 10, and that is Windows 10 version 2004 at the time of writing.
Administrators who prefer to upgrade to Windows 10 version 1909 can use the enablement package to upgrade Windows 10 version 1903 systems to version 1909. Microsoft does not provide the update directly, but it can be downloaded from Ten Forums.
The release of Windows 10 version 20H2 is a lighter upcoming release that should not cause as many update blockers and issues as Windows 10 version 2004 or Windows 10 version 1809; both updates had their fair share of issues, with 2004 still having issues up to this date.
Coincidentally, support for Windows 10 version 1809 will run out on November 10, 2020 for Home customers. End of support was extended by Microsoft because of the global Covid-19 pandemic. The company started to push feature updates to devices running Windows 10 version 1809, and it is probably only a matter of time before Windows 10 version 1903 are upgraded automatically to a newer version of the Windows 10 operating system as well.
Microsoft did change its practice in regards to the distribution of feature updates in recent time. Feature updates are now offered as optional updates that should not install automatically anymore. The only exception to the rule applies to systems that are about to run out of support because of the installed version of Windows 10.