diff --git a/crates/api/src/builder/api.rs b/crates/api/src/builder/api.rs
index b35a6fa0..6f861230 100644
--- a/crates/api/src/builder/api.rs
+++ b/crates/api/src/builder/api.rs
@@ -2193,7 +2193,7 @@ fn sanity_check_block_submission(
     chain_info: &ChainInfo,
 ) -> Result<(), BuilderApiError> {
     let expected_timestamp =
-        chain_info.genesis_time_in_secs + (bid_trace.slot * chain_info.seconds_per_slot);
+        chain_info.genesis_time() + (bid_trace.slot * chain_info.seconds_per_slot);
     if payload.timestamp() != expected_timestamp {
         return Err(BuilderApiError::IncorrectTimestamp {
             got: payload.timestamp(),
diff --git a/crates/api/src/proposer/api.rs b/crates/api/src/proposer/api.rs
index 90850099..0daa58f9 100644
--- a/crates/api/src/proposer/api.rs
+++ b/crates/api/src/proposer/api.rs
@@ -1030,8 +1030,8 @@ where
     /// Returns how many ms we are into the slot if ok.
     fn validate_bid_request_time(&self, bid_request: &BidRequest) -> Result<u64, ProposerApiError> {
         let curr_timestamp_ms = utcnow_ms() as i64;
-        let slot_start_timestamp = self.chain_info.genesis_time_in_secs +
-            (bid_request.slot * self.chain_info.seconds_per_slot);
+        let slot_start_timestamp =
+            self.chain_info.genesis_time() + (bid_request.slot * self.chain_info.seconds_per_slot);
         let ms_into_slot = curr_timestamp_ms.saturating_sub((slot_start_timestamp * 1000) as i64);
 
         if ms_into_slot > GET_HEADER_REQUEST_CUTOFF_MS {
@@ -1308,8 +1308,7 @@ where
     ) -> Result<PayloadAndBlobs, ProposerApiError> {
         const RETRY_DELAY: Duration = Duration::from_millis(20);
 
-        let slot_time =
-            self.chain_info.genesis_time_in_secs + (slot * self.chain_info.seconds_per_slot);
+        let slot_time = self.chain_info.genesis_time() + (slot * self.chain_info.seconds_per_slot);
         let slot_cutoff_millis = (slot_time * 1000) + GET_PAYLOAD_REQUEST_CUTOFF_MS as u64;
 
         let mut last_error: Option<ProposerApiError> = None;
@@ -1496,7 +1495,7 @@ fn calculate_slot_time_info(
     request_time: u64,
 ) -> (i64, Duration) {
     let slot_start_timestamp_in_secs =
-        chain_info.genesis_time_in_secs + (slot * chain_info.seconds_per_slot);
+        chain_info.genesis_time() + (slot * chain_info.seconds_per_slot);
     let ms_into_slot =
         (request_time / 1_000_000) as i64 - (slot_start_timestamp_in_secs * 1000) as i64;
     let duration_until_slot_start = chain_info.clock.duration_until_slot(slot);
diff --git a/crates/common/src/chain_info.rs b/crates/common/src/chain_info.rs
index 73c03182..a7bd6f58 100644
--- a/crates/common/src/chain_info.rs
+++ b/crates/common/src/chain_info.rs
@@ -93,6 +93,16 @@ impl ChainInfo {
         }
     }
 
+    pub fn genesis_time(&self) -> u64 {
+        match self.network {
+            Network::Mainnet => self.genesis_time_in_secs,
+            Network::Sepolia => self.genesis_time_in_secs,
+            Network::Goerli => self.genesis_time_in_secs,
+            Network::Holesky => self.genesis_time_in_secs,
+            Network::Custom(_) => self.genesis_time_in_secs + self.context.genesis_delay,
+        }
+    }
+
     pub fn for_sepolia() -> Self {
         Self {
             network: Network::Sepolia,
@@ -142,11 +152,9 @@ impl ChainInfo {
     ) -> Result<Self, Error> {
         let context = Context::try_from_file(&config)?;
         let network = Network::Custom(config.clone());
-        let clock = from_system_time(
-            genesis_time_in_secs,
-            context.seconds_per_slot,
-            context.slots_per_epoch,
-        );
+        let genesis_time = context.min_genesis_time + context.genesis_delay;
+        let clock =
+            from_system_time(genesis_time, context.seconds_per_slot, context.slots_per_epoch);
         let seconds_per_slot = context.seconds_per_slot;
 
         Ok(Self {
diff --git a/crates/housekeeper/src/chain_event_updater.rs b/crates/housekeeper/src/chain_event_updater.rs
index 0321c46e..b2e747f8 100644
--- a/crates/housekeeper/src/chain_event_updater.rs
+++ b/crates/housekeeper/src/chain_event_updater.rs
@@ -152,7 +152,7 @@ impl<D: DatabaseService> ChainEventUpdater<D> {
         // Validate this isn't a faulty head slot
 
         let slot_timestamp =
-            self.chain_info.genesis_time_in_secs + (slot * self.chain_info.seconds_per_slot);
+            self.chain_info.genesis_time() + (slot * self.chain_info.seconds_per_slot);
         if slot_timestamp > utcnow_sec() + MAX_DISTANCE_FOR_FUTURE_SLOT {
             warn!(head_slot = slot, "slot is too far in the future",);
             return