diff --git a/operator/Makefile b/operator/Makefile
index a7a1d33f2be5a..7938440315cc7 100644
--- a/operator/Makefile
+++ b/operator/Makefile
@@ -501,6 +501,10 @@ bundle: yq manifests kustomize operator-sdk ## Generate bundle manifests and met
        bundle/manifests/rhacs-operator.clusterserviceversion.yaml
 	$(OPERATOR_SDK) bundle validate ./bundle --select-optional suite=operatorframework
 
+# Use git commit timestamp for reproducible builds
+SOURCE_DATE_EPOCH ?= $(shell git log -1 --format=%ct)
+export SOURCE_DATE_EPOCH
+
 .PHONY: bundle-post-process
 bundle-post-process: test-bundle-helpers operator-sdk ## Post-process CSV file to include correct operator versions, etc.
 # Note: Python venv is always needed because dispatch.sh may use yaml-normalizer.py
@@ -532,7 +536,7 @@ bundle-post-process: test-bundle-helpers operator-sdk ## Post-process CSV file t
 
 .PHONY: bundle-build
 bundle-build: bundle.Dockerfile bundle-post-process ## Build the bundle image.
-	docker build $(if $(DOCKER_BUILD_LOAD),--load) -f $< -t $(BUNDLE_IMG) .
+	docker build $(if $(DOCKER_BUILD_LOAD),--load) --build-arg SOURCE_DATE_EPOCH=$(SOURCE_DATE_EPOCH) -f $< -t $(BUNDLE_IMG) .
 
 .PHONY: bundle-test
 bundle-test: operator-sdk bundle-post-process ## Run scorecard tests against bundle files.
diff --git a/operator/bundle.Dockerfile.extra b/operator/bundle.Dockerfile.extra
index da077abe093fd..fc157b6853b6c 100644
--- a/operator/bundle.Dockerfile.extra
+++ b/operator/bundle.Dockerfile.extra
@@ -1,3 +1,6 @@
+# Reproducible builds support
+ARG SOURCE_DATE_EPOCH
+
 # Labels for operator certification https://redhat-connect.gitbook.io/certified-operator-guide/ocp-deployment/operator-metadata/bundle-directory
 LABEL com.redhat.delivery.operator.bundle=true
 
diff --git a/operator/bundle_helpers/pkg/csv/patcher.go b/operator/bundle_helpers/pkg/csv/patcher.go
index bb39135c57ae8..9cf8e2bdb1017 100644
--- a/operator/bundle_helpers/pkg/csv/patcher.go
+++ b/operator/bundle_helpers/pkg/csv/patcher.go
@@ -4,6 +4,8 @@ import (
 	"errors"
 	"fmt"
 	"os"
+	"sort"
+	"strconv"
 	"strings"
 	"time"
 
@@ -40,7 +42,14 @@ func GetRawName(doc chartutil.Values) (string, error) {
 // PatchCSV modifies the CSV document in-place according to options
 func PatchCSV(doc chartutil.Values, opts PatchOptions) error {
 	// Update createdAt timestamp
-	if err := values.CoalesceValue(doc, "metadata.annotations.createdAt", time.Now().UTC().Format(time.RFC3339)); err != nil {
+	// Use SOURCE_DATE_EPOCH if set (for reproducible builds), otherwise use current time
+	createdAt := time.Now().UTC()
+	if epoch := os.Getenv("SOURCE_DATE_EPOCH"); epoch != "" {
+		if timestamp, err := strconv.ParseInt(epoch, 10, 64); err == nil {
+			createdAt = time.Unix(timestamp, 0).UTC()
+		}
+	}
+	if err := values.CoalesceValue(doc, "metadata.annotations.createdAt", createdAt.Format(time.RFC3339)); err != nil {
 		return fmt.Errorf("failed to set createdAt: %w", err)
 	}
 
@@ -172,7 +181,11 @@ func setRelatedImages(spec chartutil.Values, managerImage string) error {
 	relatedImages := make([]map[string]any, 0)
 
 	// Collect all RELATED_IMAGE_* env vars
-	for _, envVar := range os.Environ() {
+	// Sort environment variables for deterministic order
+	envVars := os.Environ()
+	sort.Strings(envVars)
+
+	for _, envVar := range envVars {
 		if strings.HasPrefix(envVar, "RELATED_IMAGE_") {
 			parts := strings.SplitN(envVar, "=", 2)
 			if len(parts) != 2 {
diff --git a/operator/konflux.bundle.Dockerfile b/operator/konflux.bundle.Dockerfile
index 2bee8416585c3..bc3007070244e 100644
--- a/operator/konflux.bundle.Dockerfile
+++ b/operator/konflux.bundle.Dockerfile
@@ -1,4 +1,9 @@
 FROM brew.registry.redhat.io/rh-osbs/openshift-golang-builder:rhel_9_golang_1.25@sha256:bd531796aacb86e4f97443797262680fbf36ca048717c00b6f4248465e1a7c0c AS builder
+
+# Reproducible builds support
+ARG SOURCE_DATE_EPOCH
+ENV SOURCE_DATE_EPOCH=$SOURCE_DATE_EPOCH
+
 # This installs PyYAML (with Python) needed by bundle_helpers.
 RUN dnf -y install --allowerasing python3.12-pyyaml && \
     alternatives --install /usr/bin/python3 python3 /usr/bin/python3.12 1