diff --git a/docs/docs/supply-chain/attestation/vuln.md b/docs/docs/supply-chain/attestation/vuln.md
index e0f78a541a49..c17164f0f30b 100644
--- a/docs/docs/supply-chain/attestation/vuln.md
+++ b/docs/docs/supply-chain/attestation/vuln.md
@@ -30,6 +30,7 @@ $ trivy image --format cosign-vuln --output vuln.json alpine:3.10
     },
     "result": {
       "SchemaVersion": 2,
+      "CreatedAt": 1629894030,
       "ArtifactName": "alpine:3.10",
       "ArtifactType": "container_image",
       "Metadata": {
diff --git a/pkg/cloud/aws/commands/run_test.go b/pkg/cloud/aws/commands/run_test.go
index 70d8dc672368..292c6040c9ad 100644
--- a/pkg/cloud/aws/commands/run_test.go
+++ b/pkg/cloud/aws/commands/run_test.go
@@ -12,11 +12,13 @@ import (
 
 	defsecTypes "github.com/aquasecurity/defsec/pkg/types"
 	dbTypes "github.com/aquasecurity/trivy-db/pkg/types"
+	"github.com/aquasecurity/trivy/pkg/clock"
 	"github.com/aquasecurity/trivy/pkg/compliance/spec"
 	"github.com/aquasecurity/trivy/pkg/flag"
 )
 
 const expectedS3ScanResult = `{
+  "CreatedAt": 1629894030,
   "ArtifactName": "12345678",
   "ArtifactType": "aws_account",
   "Metadata": {
@@ -264,6 +266,7 @@ const expectedS3ScanResult = `{
 `
 
 const expectedCustomScanResult = `{
+  "CreatedAt": 1629894030,
   "ArtifactName": "12345678",
   "ArtifactType": "aws_account",
   "Metadata": {
@@ -544,6 +547,7 @@ const expectedCustomScanResult = `{
 `
 
 const expectedS3AndCloudTrailResult = `{
+  "CreatedAt": 1629894030,
   "ArtifactName": "123456789",
   "ArtifactType": "aws_account",
   "Metadata": {
@@ -1125,6 +1129,7 @@ Summary Report for compliance: my-custom-spec
 	}
 	for _, test := range tests {
 		t.Run(test.name, func(t *testing.T) {
+			clock.SetFakeTime(t, time.Date(2021, 8, 25, 12, 20, 30, 5, time.UTC))
 			if test.allServices != nil {
 				oldAllSupportedServicesFunc := allSupportedServicesFunc
 				allSupportedServicesFunc = func() []string {
diff --git a/pkg/cloud/report/service_test.go b/pkg/cloud/report/service_test.go
index 6e4ae99c2cd4..437f1844aed0 100644
--- a/pkg/cloud/report/service_test.go
+++ b/pkg/cloud/report/service_test.go
@@ -4,6 +4,7 @@ import (
 	"os"
 	"path/filepath"
 	"testing"
+	"time"
 
 	"github.com/aws/aws-sdk-go-v2/aws/arn"
 	"github.com/stretchr/testify/assert"
@@ -11,6 +12,7 @@ import (
 
 	"github.com/aquasecurity/defsec/pkg/scan"
 	defsecTypes "github.com/aquasecurity/defsec/pkg/types"
+	"github.com/aquasecurity/trivy/pkg/clock"
 	"github.com/aquasecurity/trivy-db/pkg/types"
 	"github.com/aquasecurity/trivy/pkg/flag"
 )
@@ -148,6 +150,7 @@ Scan Overview for AWS Account
 			fromCache: false,
 			expected: `{
   "ArtifactType": "aws_account",
+  "CreatedAt": 1629894030,
   "Metadata": {
     "ImageConfig": {
       "architecture": "",
@@ -309,6 +312,7 @@ Scan Overview for AWS Account
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
+			clock.SetFakeTime(t, time.Date(2021, 8, 25, 12, 20, 30, 5, time.UTC))
 			report := New(
 				"AWS",
 				tt.options.AWSOptions.Account,
diff --git a/pkg/report/writer.go b/pkg/report/writer.go
index 31c606f1e5bf..2b2e1c70ddc5 100644
--- a/pkg/report/writer.go
+++ b/pkg/report/writer.go
@@ -9,6 +9,7 @@ import (
 
 	cr "github.com/aquasecurity/trivy/pkg/compliance/report"
 	ftypes "github.com/aquasecurity/trivy/pkg/fanal/types"
+	"github.com/aquasecurity/trivy/pkg/clock"
 	"github.com/aquasecurity/trivy/pkg/flag"
 	"github.com/aquasecurity/trivy/pkg/log"
 	"github.com/aquasecurity/trivy/pkg/report/cyclonedx"
@@ -91,6 +92,8 @@ func Write(report types.Report, option flag.Options) error {
 		return xerrors.Errorf("unknown format: %v", option.Format)
 	}
 
+	report.CreatedAt = clock.Now().Unix()
+
 	if err := writer.Write(report); err != nil {
 		return xerrors.Errorf("failed to write results: %w", err)
 	}
diff --git a/pkg/types/report.go b/pkg/types/report.go
index a085ee454519..edead1568ca1 100644
--- a/pkg/types/report.go
+++ b/pkg/types/report.go
@@ -11,6 +11,7 @@ import (
 // Report represents a scan result
 type Report struct {
 	SchemaVersion int                 `json:",omitempty"`
+	CreatedAt     int64               `json:",omitempty"`
 	ArtifactName  string              `json:",omitempty"`
 	ArtifactType  ftypes.ArtifactType `json:",omitempty"`
 	Metadata      Metadata            `json:",omitempty"`