diff --git a/staging/src/k8s.io/apiserver/pkg/authentication/request/x509/x509.go b/staging/src/k8s.io/apiserver/pkg/authentication/request/x509/x509.go
index eeb7c09881e..63010aadc2c 100644
--- a/staging/src/k8s.io/apiserver/pkg/authentication/request/x509/x509.go
+++ b/staging/src/k8s.io/apiserver/pkg/authentication/request/x509/x509.go
@@ -49,19 +49,19 @@ var clientCertificateExpirationHistogram = metrics.NewHistogram(
 		Help:      "Distribution of the remaining lifetime on the certificate used to authenticate a request.",
 		Buckets: []float64{
 			0,
-			(30 * time.Minute).Seconds(),
-			(1 * time.Hour).Seconds(),
-			(2 * time.Hour).Seconds(),
-			(6 * time.Hour).Seconds(),
-			(12 * time.Hour).Seconds(),
-			(24 * time.Hour).Seconds(),
-			(2 * 24 * time.Hour).Seconds(),
-			(4 * 24 * time.Hour).Seconds(),
-			(7 * 24 * time.Hour).Seconds(),
-			(30 * 24 * time.Hour).Seconds(),
-			(3 * 30 * 24 * time.Hour).Seconds(),
-			(6 * 30 * 24 * time.Hour).Seconds(),
-			(12 * 30 * 24 * time.Hour).Seconds(),
+			1800,     // 30 minutes
+			3600,     // 1 hour
+			7200,     // 2 hours
+			21600,    // 6 hours
+			43200,    // 12 hours
+			86400,    // 1 day
+			172800,   // 2 days
+			345600,   // 4 days
+			604800,   // 1 week
+			2592000,  // 1 month
+			7776000,  // 3 months
+			15552000, // 6 months
+			31104000, // 1 year
 		},
 		StabilityLevel: metrics.ALPHA,
 	},