1000 Days [Hardcore Minecraft].zip is a release file of the Minecraft map My 1000 Days Hardcore World, made for Minecraft 1.17.1. It was published on March 29, 2022 and is 188.6 MB in size. For the full description, screenshots and every other version, visit the My 1000 Days Hardcore World map page.
How to install: Extract the .zip and move the world folder into .minecraft/saves; the map then appears in your Singleplayer list.