diff --git a/pkg/provider/identityprovider.go b/pkg/provider/identityprovider.go
index 073eaa8..3a7c024 100644
--- a/pkg/provider/identityprovider.go
+++ b/pkg/provider/identityprovider.go
@@ -153,7 +153,7 @@ func (p *IdentityProvider) GetMetadata(ctx context.Context) (*md.IDPSSODescripto
 		return nil, nil, err
 	}
 
-	metadata, aaMetadata := p.conf.getMetadata(ctx, p.GetEntityID(ctx), cert)
+	metadata, aaMetadata := p.conf.getMetadata(ctx, p.GetEntityID(ctx), cert, p.timeFormat)
 	return metadata, aaMetadata, nil
 }
 
diff --git a/pkg/provider/logout.go b/pkg/provider/logout.go
index f810a0e..1807947 100644
--- a/pkg/provider/logout.go
+++ b/pkg/provider/logout.go
@@ -69,6 +69,7 @@ func (p *IdentityProvider) logoutHandleFunc(w http.ResponseWriter, r *http.Reque
 		checkIfRequestTimeIsStillValid(
 			func() string { return logoutRequest.IssueInstant },
 			func() string { return logoutRequest.NotOnOrAfter },
+			p.timeFormat,
 		),
 		func() {
 			response.sendBackLogoutResponse(w, response.makeDeniedLogoutResponse(fmt.Errorf("failed to validate request: %w", err).Error(), p.timeFormat))
diff --git a/pkg/provider/metadata.go b/pkg/provider/metadata.go
index 4bfd969..59952ce 100644
--- a/pkg/provider/metadata.go
+++ b/pkg/provider/metadata.go
@@ -39,6 +39,7 @@ func (p *IdentityProviderConfig) getMetadata(
 	ctx context.Context,
 	entityID string,
 	idpCertData []byte,
+	timeFormat string,
 ) (*md.IDPSSODescriptorType, *md.AttributeAuthorityDescriptorType) {
 	endpoints := endpointConfigToEndpoints(p.Endpoints)
 
@@ -80,7 +81,7 @@ func (p *IdentityProviderConfig) getMetadata(
 	}
 	validUntil := ""
 	if p.MetadataIDPConfig.ValidUntil != 0 {
-		validUntil = time.Now().Add(p.MetadataIDPConfig.ValidUntil).UTC().Format(defaultTimeLayout)
+		validUntil = time.Now().Add(p.MetadataIDPConfig.ValidUntil).UTC().Format(timeFormat)
 	}
 	cacheDuration := ""
 	if p.MetadataIDPConfig.CacheDuration != "" {
diff --git a/pkg/provider/sso.go b/pkg/provider/sso.go
index 5c21840..78f2c24 100644
--- a/pkg/provider/sso.go
+++ b/pkg/provider/sso.go
@@ -287,6 +287,7 @@ func checkRequestRequiredContent(
 			if err := checkIfRequestTimeIsStillValid(
 				func() string { return authNRequest.Conditions.NotBefore },
 				func() string { return authNRequest.Conditions.NotOnOrAfter },
+				DefaultTimeFormat,
 			)(); err != nil {
 				return err
 			}
diff --git a/pkg/provider/time.go b/pkg/provider/time.go
index 3c4bca9..40bbaf1 100644
--- a/pkg/provider/time.go
+++ b/pkg/provider/time.go
@@ -5,13 +5,11 @@ import (
 	"time"
 )
 
-const defaultTimeLayout = "2006-01-02T15:04:05.999999Z"
-
-func checkIfRequestTimeIsStillValid(notBefore func() string, notOnOrAfter func() string) func() error {
+func checkIfRequestTimeIsStillValid(notBefore func() string, notOnOrAfter func() string, timeFormat string) func() error {
 	return func() error {
 		now := time.Now().UTC()
 		if notBefore() != "" {
-			t, err := time.Parse(defaultTimeLayout, notBefore())
+			t, err := time.Parse(timeFormat, notBefore())
 			if err != nil {
 				return fmt.Errorf("failed to parse NotBefore: %w", err)
 			}
@@ -21,7 +19,7 @@ func checkIfRequestTimeIsStillValid(notBefore func() string, notOnOrAfter func()
 		}
 
 		if notOnOrAfter() != "" {
-			t, err := time.Parse(defaultTimeLayout, notOnOrAfter())
+			t, err := time.Parse(timeFormat, notOnOrAfter())
 			if err != nil {
 				return fmt.Errorf("failed to parse NotOnOrAfter: %w", err)
 			}
diff --git a/pkg/provider/time_test.go b/pkg/provider/time_test.go
index c888c5a..e447057 100644
--- a/pkg/provider/time_test.go
+++ b/pkg/provider/time_test.go
@@ -5,6 +5,10 @@ import (
 	"time"
 )
 
+const (
+	otherTimeFormat = "2006-01-02T15:04:05.999Z"
+)
+
 func TestTime_checkIfRequestTimeIsStillValid(t *testing.T) {
 	type args struct {
 		notBefore    string
@@ -20,40 +24,56 @@ func TestTime_checkIfRequestTimeIsStillValid(t *testing.T) {
 		{
 			"check ok 1",
 			args{
-				notBefore:    now.Add(-1 * time.Minute).Format(defaultTimeLayout),
-				notOnOrAfter: now.Add(1 * time.Minute).Format(defaultTimeLayout),
+				notBefore:    now.Add(-1 * time.Minute).Format(DefaultTimeFormat),
+				notOnOrAfter: now.Add(1 * time.Minute).Format(DefaultTimeFormat),
 			},
 			false,
 		},
 		{
 			"check ok 2",
 			args{
-				notBefore:    now.Add(-1 * time.Minute).Format(defaultTimeLayout),
-				notOnOrAfter: now.Add(5 * time.Minute).Format(defaultTimeLayout),
+				notBefore:    now.Add(-1 * time.Minute).Format(DefaultTimeFormat),
+				notOnOrAfter: now.Add(5 * time.Minute).Format(DefaultTimeFormat),
 			},
 			false,
 		},
 		{
 			"check ok 3",
 			args{
-				notBefore:    now.Add(-5 * time.Minute).Format(defaultTimeLayout),
-				notOnOrAfter: now.Add(5 * time.Minute).Format(defaultTimeLayout),
+				notBefore:    now.Add(-5 * time.Minute).Format(DefaultTimeFormat),
+				notOnOrAfter: now.Add(5 * time.Minute).Format(DefaultTimeFormat),
+			},
+			false,
+		},
+		{
+			"check ok otherformat",
+			args{
+				notBefore:    now.Add(-5 * time.Minute).Format(otherTimeFormat),
+				notOnOrAfter: now.Add(5 * time.Minute).Format(otherTimeFormat),
 			},
 			false,
 		},
 		{
 			"check not ok 1",
 			args{
-				notBefore:    now.Add(1 * time.Minute).Format(defaultTimeLayout),
-				notOnOrAfter: now.Add(5 * time.Minute).Format(defaultTimeLayout),
+				notBefore:    now.Add(1 * time.Minute).Format(DefaultTimeFormat),
+				notOnOrAfter: now.Add(5 * time.Minute).Format(DefaultTimeFormat),
 			},
 			true,
 		},
 		{
 			"check not ok 2",
 			args{
-				notBefore:    now.Add(-5 * time.Minute).Format(defaultTimeLayout),
-				notOnOrAfter: now.Add(-1 * time.Minute).Format(defaultTimeLayout),
+				notBefore:    now.Add(-5 * time.Minute).Format(DefaultTimeFormat),
+				notOnOrAfter: now.Add(-1 * time.Minute).Format(DefaultTimeFormat),
+			},
+			true,
+		},
+		{
+			"check not ok otherFormat",
+			args{
+				notBefore:    now.Add(-5 * time.Minute).Format(otherTimeFormat),
+				notOnOrAfter: now.Add(-1 * time.Minute).Format(otherTimeFormat),
 			},
 			true,
 		},
@@ -69,7 +89,7 @@ func TestTime_checkIfRequestTimeIsStillValid(t *testing.T) {
 			"check ok only notOnOrAfter",
 			args{
 				notBefore:    "",
-				notOnOrAfter: now.Add(1 * time.Minute).Format(defaultTimeLayout),
+				notOnOrAfter: now.Add(1 * time.Minute).Format(DefaultTimeFormat),
 			},
 			false,
 		},
@@ -77,14 +97,14 @@ func TestTime_checkIfRequestTimeIsStillValid(t *testing.T) {
 			"check not ok only notOnOrAfter",
 			args{
 				notBefore:    "",
-				notOnOrAfter: now.Add(-1 * time.Minute).Format(defaultTimeLayout),
+				notOnOrAfter: now.Add(-1 * time.Minute).Format(DefaultTimeFormat),
 			},
 			true,
 		},
 		{
 			"check not ok only notBefore",
 			args{
-				notBefore:    now.Add(1 * time.Minute).Format(defaultTimeLayout),
+				notBefore:    now.Add(1 * time.Minute).Format(DefaultTimeFormat),
 				notOnOrAfter: "",
 			},
 			true,
@@ -92,7 +112,7 @@ func TestTime_checkIfRequestTimeIsStillValid(t *testing.T) {
 		{
 			"check ok only notBefore",
 			args{
-				notBefore:    now.Add(-1 * time.Minute).Format(defaultTimeLayout),
+				notBefore:    now.Add(-1 * time.Minute).Format(DefaultTimeFormat),
 				notOnOrAfter: "",
 			},
 			false,
@@ -124,7 +144,7 @@ func TestTime_checkIfRequestTimeIsStillValid(t *testing.T) {
 				return tt.args.notOnOrAfter
 			}
 
-			errF := checkIfRequestTimeIsStillValid(notBeforeF, notOnOrAfterF)
+			errF := checkIfRequestTimeIsStillValid(notBeforeF, notOnOrAfterF, DefaultTimeFormat)
 			err := errF()
 			if (err != nil) != tt.res {
 				t.Errorf("ParseCertificates() got = %v, want %v", err != nil, tt.res)