diff --git a/pages/builders/notices/holocene-changes.mdx b/pages/builders/notices/holocene-changes.mdx
index 8f060bd0c..7b5b4af3c 100644
--- a/pages/builders/notices/holocene-changes.mdx
+++ b/pages/builders/notices/holocene-changes.mdx
@@ -12,7 +12,7 @@ This page outlines breaking changes related to the Holocene network upgrade for
 If you experience difficulty at any stage of this process, please reach out to [developer support](https://github.com/ethereum-optimism/developers/discussions).
 
 <Callout type="info">
-   The Holocene upgrade for the Unichain Sepolia will be activated at **Mon Dec 18 at 00:00:00 UTC**.
+   The Holocene upgrade for the Unichain Sepolia will be activated at **Wed Dec 18 at 22:00:00 UTC** (`1734559200`).
   
   The Holocene upgrade for the Sepolia Superchain will be activated at **Tue Nov 26 at 15:00:00 UTC** (`1732633200`).