diff --git a/pkg/assembler/backends/arangodb/certifyBad.go b/pkg/assembler/backends/arangodb/certifyBad.go
index 52ba52c269d..7cc8b0ad6a5 100644
--- a/pkg/assembler/backends/arangodb/certifyBad.go
+++ b/pkg/assembler/backends/arangodb/certifyBad.go
@@ -946,7 +946,7 @@ func getCertifyBadFromCursor(ctx context.Context, cursor driver.Cursor) ([]*mode
 			Justification: createdValue.Justification,
 			Origin:        createdValue.Collector,
 			Collector:     createdValue.Origin,
-			KnownSince:    createdValue.KnownSince,
+			KnownSince:    createdValue.KnownSince.UTC(),
 		}
 
 		if pkg != nil {
diff --git a/pkg/assembler/backends/arangodb/certifyLegal.go b/pkg/assembler/backends/arangodb/certifyLegal.go
index c5c65772927..5e0263212df 100644
--- a/pkg/assembler/backends/arangodb/certifyLegal.go
+++ b/pkg/assembler/backends/arangodb/certifyLegal.go
@@ -855,7 +855,7 @@ func (c *arangoClient) getCertifyLegalFromCursor(ctx context.Context,
 			DiscoveredLicense: createdValue.DiscoveredLicense,
 			Attribution:       createdValue.Attribution,
 			Justification:     createdValue.Justification,
-			TimeScanned:       createdValue.TimeScanned,
+			TimeScanned:       createdValue.TimeScanned.UTC(),
 			Origin:            createdValue.Origin,
 			Collector:         createdValue.Collector,
 		}
diff --git a/pkg/assembler/backends/arangodb/certifyVuln.go b/pkg/assembler/backends/arangodb/certifyVuln.go
index caa86e6c074..31f68139be7 100644
--- a/pkg/assembler/backends/arangodb/certifyVuln.go
+++ b/pkg/assembler/backends/arangodb/certifyVuln.go
@@ -113,7 +113,7 @@ func setCertifyVulnMatchValues(arangoQueryBuilder *arangoQueryBuilder, certifyVu
 	}
 	if certifyVulnSpec.TimeScanned != nil {
 		arangoQueryBuilder.filter("certifyVuln", timeScannedStr, "==", "@"+timeScannedStr)
-		queryValues[timeScannedStr] = certifyVulnSpec.TimeScanned.UTC()
+		queryValues[timeScannedStr] = certifyVulnSpec.TimeScanned
 	}
 	if certifyVulnSpec.DbURI != nil {
 		arangoQueryBuilder.filter("certifyVuln", dbUriStr, "==", "@"+dbUriStr)
diff --git a/pkg/assembler/backends/ent/backend/certify.go b/pkg/assembler/backends/ent/backend/certify.go
index 78fc37eb0e8..36f682d1c8b 100644
--- a/pkg/assembler/backends/ent/backend/certify.go
+++ b/pkg/assembler/backends/ent/backend/certify.go
@@ -162,7 +162,7 @@ func upsertCertification[T certificationInputSpec](ctx context.Context, client *
 			SetJustification(v.Justification).
 			SetOrigin(v.Origin).
 			SetCollector(v.Collector).
-			SetKnownSince(v.KnownSince)
+			SetKnownSince(v.KnownSince.UTC())
 	case model.CertifyGoodInputSpec:
 		insert.
 			SetType(certification.TypeGOOD).
diff --git a/pkg/assembler/backends/ent/backend/certifyLegal.go b/pkg/assembler/backends/ent/backend/certifyLegal.go
index 402012df9ec..164a72b3d29 100644
--- a/pkg/assembler/backends/ent/backend/certifyLegal.go
+++ b/pkg/assembler/backends/ent/backend/certifyLegal.go
@@ -97,7 +97,7 @@ func (b *EntBackend) IngestCertifyLegal(ctx context.Context, subject model.Packa
 			SetDiscoveredLicense(spec.DiscoveredLicense).
 			SetAttribution(spec.Attribution).
 			SetJustification(spec.Justification).
-			SetTimeScanned(spec.TimeScanned).
+			SetTimeScanned(spec.TimeScanned.UTC()).
 			SetOrigin(spec.Origin).
 			SetCollector(spec.Collector)
 
diff --git a/pkg/assembler/backends/ent/backend/certifyVEXStatement.go b/pkg/assembler/backends/ent/backend/certifyVEXStatement.go
index 1c4e88cc59b..a6ede389b02 100644
--- a/pkg/assembler/backends/ent/backend/certifyVEXStatement.go
+++ b/pkg/assembler/backends/ent/backend/certifyVEXStatement.go
@@ -92,7 +92,7 @@ func (b *EntBackend) IngestVEXStatement(ctx context.Context, subject model.Packa
 		}
 
 		insert.
-			SetKnownSince(vexStatement.KnownSince).
+			SetKnownSince(vexStatement.KnownSince.UTC()).
 			SetStatus(vexStatement.Status.String()).
 			SetStatement(vexStatement.Statement).
 			SetStatusNotes(vexStatement.StatusNotes).
@@ -187,7 +187,7 @@ func toModelCertifyVEXStatement(record *ent.CertifyVex) *model.CertifyVEXStateme
 		ID:               nodeID(record.ID),
 		Subject:          toPackageOrArtifact(record.Edges.Package, record.Edges.Artifact),
 		Vulnerability:    toModelVulnerabilityFromVulnerabilityID(record.Edges.Vulnerability),
-		KnownSince:       record.KnownSince,
+		KnownSince:       record.KnownSince.UTC(),
 		Status:           model.VexStatus(record.Status),
 		Statement:        record.Statement,
 		StatusNotes:      record.StatusNotes,
diff --git a/pkg/assembler/backends/ent/backend/scorecard.go b/pkg/assembler/backends/ent/backend/scorecard.go
index d6fd5427091..9453ec58aee 100644
--- a/pkg/assembler/backends/ent/backend/scorecard.go
+++ b/pkg/assembler/backends/ent/backend/scorecard.go
@@ -133,7 +133,7 @@ func upsertScorecard(ctx context.Context, tx *ent.Tx, source model.SourceInputSp
 		Create().
 		SetChecks(checks).
 		SetAggregateScore(scorecardInput.AggregateScore).
-		SetTimeScanned(scorecardInput.TimeScanned).
+		SetTimeScanned(scorecardInput.TimeScanned.UTC()).
 		SetScorecardVersion(scorecardInput.ScorecardVersion).
 		SetScorecardCommit(scorecardInput.ScorecardCommit).
 		SetOrigin(scorecardInput.Origin).
@@ -182,7 +182,7 @@ func toModelScorecard(record *ent.Scorecard) *model.Scorecard {
 	return &model.Scorecard{
 		Checks:           record.Checks,
 		AggregateScore:   record.AggregateScore,
-		TimeScanned:      record.TimeScanned,
+		TimeScanned:      record.TimeScanned.UTC(),
 		ScorecardVersion: record.ScorecardVersion,
 		ScorecardCommit:  record.ScorecardCommit,
 		Origin:           record.Origin,
diff --git a/pkg/assembler/backends/ent/backend/source.go b/pkg/assembler/backends/ent/backend/source.go
index 0092f5c3ab6..258d8df949b 100644
--- a/pkg/assembler/backends/ent/backend/source.go
+++ b/pkg/assembler/backends/ent/backend/source.go
@@ -103,7 +103,7 @@ func upsertHasSourceAt(ctx context.Context, client *ent.Tx, pkg model.PkgInputSp
 		SetCollector(spec.Collector).
 		SetOrigin(spec.Origin).
 		SetJustification(spec.Justification).
-		SetKnownSince(spec.KnownSince).
+		SetKnownSince(spec.KnownSince.UTC()).
 		SetSourceID(srcID)
 
 	if pkgMatchType.Pkg == model.PkgMatchTypeAllVersions {
diff --git a/pkg/assembler/backends/inmem/certifyBad.go b/pkg/assembler/backends/inmem/certifyBad.go
index 92924388f49..4619b68cd14 100644
--- a/pkg/assembler/backends/inmem/certifyBad.go
+++ b/pkg/assembler/backends/inmem/certifyBad.go
@@ -162,7 +162,7 @@ func (c *demoClient) ingestCertifyBad(ctx context.Context, subject model.Package
 		}
 		if subjectMatch && certifyBad.Justification == v.justification &&
 			certifyBad.Origin == v.origin && certifyBad.Collector == v.collector &&
-			certifyBad.KnownSince.Equal(v.knownSince) {
+			certifyBad.KnownSince.UTC().Equal(v.knownSince.UTC()) {
 
 			collectedCertifyBadLink = *v
 			duplicate = true
diff --git a/pkg/assembler/backends/inmem/certifyGood.go b/pkg/assembler/backends/inmem/certifyGood.go
index 1d8b93a84ea..ffa17889ee1 100644
--- a/pkg/assembler/backends/inmem/certifyGood.go
+++ b/pkg/assembler/backends/inmem/certifyGood.go
@@ -161,7 +161,7 @@ func (c *demoClient) ingestCertifyGood(ctx context.Context, subject model.Packag
 		}
 		if subjectMatch && certifyGood.Justification == v.justification &&
 			certifyGood.Origin == v.origin && certifyGood.Collector == v.collector &&
-			certifyGood.KnownSince.Equal(v.knownSince) {
+			certifyGood.KnownSince.UTC().Equal(v.knownSince.UTC()) {
 
 			collectedCertifyGoodLink = *v
 			duplicate = true
@@ -292,7 +292,7 @@ func (c *demoClient) addCGIfMatch(out []*model.CertifyGood,
 			noMatch(filter.Collector, link.collector) ||
 			noMatch(filter.Collector, link.collector) ||
 			noMatch(filter.Origin, link.origin) ||
-			filter.KnownSince != nil && filter.KnownSince.After(link.knownSince) {
+			filter.KnownSince != nil && filter.KnownSince.UTC().After(link.knownSince.UTC()) {
 			return out, nil
 		}
 	}
diff --git a/pkg/assembler/backends/inmem/certifyLegal.go b/pkg/assembler/backends/inmem/certifyLegal.go
index 59d30d3b769..c4b3bbca704 100644
--- a/pkg/assembler/backends/inmem/certifyLegal.go
+++ b/pkg/assembler/backends/inmem/certifyLegal.go
@@ -164,7 +164,7 @@ func (c *demoClient) ingestCertifyLegal(ctx context.Context, subject model.Packa
 			cl.discoveredLicense == certifyLegal.DiscoveredLicense &&
 			slices.Equal(cl.discoveredLicenses, dis) &&
 			cl.attribution == certifyLegal.Attribution &&
-			cl.timeScanned.Equal(certifyLegal.TimeScanned) &&
+			cl.timeScanned.UTC().Equal(certifyLegal.TimeScanned.UTC()) &&
 			cl.justification == certifyLegal.Justification &&
 			cl.origin == certifyLegal.Origin &&
 			cl.collector == certifyLegal.Collector {
@@ -223,7 +223,7 @@ func (c *demoClient) convLegal(in *certifyLegalStruct) (*model.CertifyLegal, err
 		DiscoveredLicense: in.discoveredLicense,
 		Attribution:       in.attribution,
 		Justification:     in.justification,
-		TimeScanned:       in.timeScanned,
+		TimeScanned:       in.timeScanned.UTC(),
 		Origin:            in.origin,
 		Collector:         in.collector,
 	}
@@ -365,7 +365,7 @@ func (c *demoClient) addLegalIfMatch(out []*model.CertifyLegal,
 		noMatch(filter.Justification, link.justification) ||
 		noMatch(filter.Origin, link.origin) ||
 		noMatch(filter.Collector, link.collector) ||
-		(filter.TimeScanned != nil && !link.timeScanned.Equal(*filter.TimeScanned)) ||
+		(filter.TimeScanned != nil && !link.timeScanned.UTC().Equal(filter.TimeScanned.UTC())) ||
 		!c.matchLicenses(filter.DeclaredLicenses, link.declaredLicenses) ||
 		!c.matchLicenses(filter.DiscoveredLicenses, link.discoveredLicenses) {
 		return out, nil