diff --git a/superchain/configs/mainnet/settlus-mainnet.toml b/superchain/configs/mainnet/settlus-mainnet.toml
index cae3dc6b3..add257b37 100755
--- a/superchain/configs/mainnet/settlus-mainnet.toml
+++ b/superchain/configs/mainnet/settlus-mainnet.toml
@@ -18,6 +18,8 @@ max_sequencer_drift = 1800
   fjord_time = 0 # Thu 1 Jan 1970 00:00:00 UTC
   granite_time = 0 # Thu 1 Jan 1970 00:00:00 UTC
   holocene_time = 0 # Thu 1 Jan 1970 00:00:00 UTC
+  isthmus_time = 1776168000 # Tue 14 Apr 2026 12:00:00 UTC
+  jovian_time = 1778155200 # Thu 7 May 2026 12:00:00 UTC
 
 [optimism]
   eip1559_elasticity = 6
diff --git a/superchain/configs/mainnet/shape.toml b/superchain/configs/mainnet/shape.toml
index 933f34ede..e53ccc975 100755
--- a/superchain/configs/mainnet/shape.toml
+++ b/superchain/configs/mainnet/shape.toml
@@ -17,6 +17,9 @@ max_sequencer_drift = 1800
   ecotone_time = 0 # Thu 1 Jan 1970 00:00:00 UTC
   fjord_time = 0 # Thu 1 Jan 1970 00:00:00 UTC
   granite_time = 1727370000 # Thu 26 Sep 2024 17:00:00 UTC
+  holocene_time = 1740139200 # Fri 21 Feb 2025 12:00:00 UTC
+  isthmus_time = 1774530000 # Thu 26 Mar 2026 13:00:00 UTC
+  jovian_time = 1778157000 # Thu 7 May 2026 12:30:00 UTC
 
 [optimism]
   eip1559_elasticity = 6
diff --git a/superchain/configs/sepolia/settlus-sepolia.toml b/superchain/configs/sepolia/settlus-sepolia.toml
index 50b3db8a9..5837e8914 100755
--- a/superchain/configs/sepolia/settlus-sepolia.toml
+++ b/superchain/configs/sepolia/settlus-sepolia.toml
@@ -17,7 +17,9 @@ max_sequencer_drift = 1800
   ecotone_time = 0 # Thu 1 Jan 1970 00:00:00 UTC
   fjord_time = 0 # Thu 1 Jan 1970 00:00:00 UTC
   granite_time = 0 # Thu 1 Jan 1970 00:00:00 UTC
-  holocene_time = 0 # Thu 1 Jan 1970 00:00:00 UTC
+  holocene_time = 1739966400 # Wed 19 Feb 2025 12:00:00 UTC
+  isthmus_time = 1763650800 # Thu 20 Nov 2025 15:00:00 UTC
+  jovian_time = 1777550400 # Thu 30 Apr 2026 12:00:00 UTC
 
 [optimism]
   eip1559_elasticity = 6
diff --git a/superchain/configs/sepolia/shape.toml b/superchain/configs/sepolia/shape.toml
index e2901b555..471217ce7 100755
--- a/superchain/configs/sepolia/shape.toml
+++ b/superchain/configs/sepolia/shape.toml
@@ -17,6 +17,9 @@ max_sequencer_drift = 1800
   ecotone_time = 0 # Thu 1 Jan 1970 00:00:00 UTC
   fjord_time = 1721732400 # Tue 23 Jul 2024 11:00:00 UTC
   granite_time = 1727197200 # Tue 24 Sep 2024 17:00:00 UTC
+  holocene_time = 1739880000 # Tue 18 Feb 2025 12:00:00 UTC
+  isthmus_time = 1763650800 # Thu 20 Nov 2025 15:00:00 UTC
+  jovian_time = 1777552200 # Thu 30 Apr 2026 12:30:00 UTC
 
 [optimism]
   eip1559_elasticity = 6