Blizzard has announced that Honor Decay will be removed entirely from the PvP Honor System on WoW Classic. This will apply to Classic Era realms and Season of Discovery.
This change will become active on December 5th, 2023.
This will become effective starting with scheduled weekly maintenance (on December 5 in this region).When the weekly Honor rollover occurs on December 5, you will no longer decay due to having not met the minimum Honor requirements for your rank. Please note that decay is not the same as the penalties incurred by earning dishonorable kills, which is now the only way a player can lose rank progress.Thank you!.
Read more on wowhead.com