If you want to enable this feature in your install of Windows 10, it's quite easy, if you know how to tweak the registry. With that being said, only proceed if you have experience adding values to the registry because if you do this incorrectly, it can break your install of Windows 10.
- Open Regedit.exe
- Go to HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurrentVersionImmersiveShell
- Right click and select New - > DWORD (32-bit) and call it UseWin32TrayClockExperience with no spaces, exactly as written.
- Click on the clock in the system tray
Full Article