diff --git a/src/network/access/qnetworkcookiejar.cpp b/src/network/access/qnetworkcookiejar.cpp
index 3cefb28f682..39f94a451fb 100644
--- a/src/network/access/qnetworkcookiejar.cpp
+++ b/src/network/access/qnetworkcookiejar.cpp
@@ -216,7 +216,7 @@ QList<QNetworkCookie> QNetworkCookieJar::cookiesForUrl(const QUrl &url) const
 //     It does not implement a very good cross-domain verification yet.
 
     Q_D(const QNetworkCookieJar);
-    QDateTime now = QDateTime::currentDateTime();
+    const QDateTime now = QDateTime::currentDateTimeUtc();
     QList<QNetworkCookie> result;
     bool isEncrypted = url.scheme().toLower() == QLatin1String("https");
 
@@ -265,7 +265,7 @@ QList<QNetworkCookie> QNetworkCookieJar::cookiesForUrl(const QUrl &url) const
 bool QNetworkCookieJar::insertCookie(const QNetworkCookie &cookie)
 {
     Q_D(QNetworkCookieJar);
-    QDateTime now = QDateTime::currentDateTime();
+    const QDateTime now = QDateTime::currentDateTimeUtc();
     bool isDeletion = !cookie.isSessionCookie() &&
                       cookie.expirationDate() < now;
 
diff --git a/src/network/ssl/qsslcertificate.h b/src/network/ssl/qsslcertificate.h
index af605b06293..d58cfcf5d16 100644
--- a/src/network/ssl/qsslcertificate.h
+++ b/src/network/ssl/qsslcertificate.h
@@ -97,7 +97,7 @@ public:
     bool isNull() const;
 #if QT_DEPRECATED_SINCE(5,0)
     QT_DEPRECATED inline bool isValid() const {
-        const QDateTime currentTime = QDateTime::currentDateTime();
+        const QDateTime currentTime = QDateTime::currentDateTimeUtc();
         return currentTime >= effectiveDate() &&
                currentTime <= expiryDate() &&
                !isBlacklisted();
diff --git a/src/network/ssl/qsslcontext_openssl.cpp b/src/network/ssl/qsslcontext_openssl.cpp
index b88ab540386..68caaeb6dc2 100644
--- a/src/network/ssl/qsslcontext_openssl.cpp
+++ b/src/network/ssl/qsslcontext_openssl.cpp
@@ -215,6 +215,8 @@ init_context:
         return sslContext;
     }
 
+    const QDateTime now = QDateTime::currentDateTimeUtc();
+
     // Add all our CAs to this store.
     foreach (const QSslCertificate &caCertificate, sslContext->sslConfiguration.caCertificates()) {
         // From https://www.openssl.org/docs/ssl/SSL_CTX_load_verify_locations.html:
@@ -228,7 +230,7 @@ init_context:
         // certificates mixed with valid ones.
         //
         // See also: QSslSocketBackendPrivate::verify()
-        if (caCertificate.expiryDate() >= QDateTime::currentDateTime()) {
+        if (caCertificate.expiryDate() >= now) {
             q_X509_STORE_add_cert(q_SSL_CTX_get_cert_store(sslContext->ctx), (X509 *)caCertificate.handle());
         }
     }
diff --git a/src/network/ssl/qsslsocket_openssl.cpp b/src/network/ssl/qsslsocket_openssl.cpp
index a8e4c61e9a8..dd47dfc45f6 100644
--- a/src/network/ssl/qsslsocket_openssl.cpp
+++ b/src/network/ssl/qsslsocket_openssl.cpp
@@ -1660,6 +1660,7 @@ QList<QSslError> QSslSocketBackendPrivate::verify(const QList<QSslCertificate> &
         setDefaultCaCertificates(defaultCaCertificates() + systemCaCertificates());
     }
 
+    const QDateTime now = QDateTime::currentDateTimeUtc();
     foreach (const QSslCertificate &caCertificate, QSslConfiguration::defaultConfiguration().caCertificates()) {
         // From https://www.openssl.org/docs/ssl/SSL_CTX_load_verify_locations.html:
         //
@@ -1672,7 +1673,7 @@ QList<QSslError> QSslSocketBackendPrivate::verify(const QList<QSslCertificate> &
         // certificates mixed with valid ones.
         //
         // See also: QSslContext::fromConfiguration()
-        if (caCertificate.expiryDate() >= QDateTime::currentDateTime()) {
+        if (caCertificate.expiryDate() >= now) {
             q_X509_STORE_add_cert(certStore, reinterpret_cast<X509 *>(caCertificate.handle()));
         }
     }