These are bleeding-edge binaries of the latest version of Julia under development, which you can use to get a preview of the latest work. The nightly builds are for developer previews and not intended for normal use. You can expect many packages not to work with this version. Most users are advised to use the latest official release version of Julia.
Nighlies are updated asynchronously for each platform after each platforms testing passes. The time the installers were updated can be seen by hovering over the links.
|Intel, Apple Silicon
|Generic Linux on x86
|Generic Linux on ARM