Diablo 2 guide - Diablo II Ladder Reset December 04

It's that time again! On the morning of Tuesday, December 04, we'll be
conducting maintenance in order to reset the Diablo II ladder. We
anticipate the realms could be down for up to six hours, and during that
time all existing ladder characters will be converted to non-ladder.
All characters and items being converted to non-ladder will remain
intact, but once converted these characters will no longer have access
to ladder content such as ladder-only rune words.

This ladder reset, like all those before it, creates a clean slate where
all ladder characters begin at level 1 with no previous items to help
them. To participate, simply wait until the Diablo II realms return to
service on December 04, log in to Battle.net, and select the Ladder
Character checkbox when creating a new character. You can track ladder
character leveling progress by clicking on the Ladder button from the
main Diablo II in-game Battle.net interface.