diff --git a/xCAT-server/share/xcat/scripts/setup-local-client.sh b/xCAT-server/share/xcat/scripts/setup-local-client.sh
index 329cf5789..ff929d253 100755
--- a/xCAT-server/share/xcat/scripts/setup-local-client.sh
+++ b/xCAT-server/share/xcat/scripts/setup-local-client.sh
@@ -60,7 +60,7 @@ cd $XCATDIR/ca
 #   - seems to be a problem with the use of the wildcard in the Makefile
 #   - calling cmds directly instead - should be safe
 # make sign
-openssl ca -startdate 19600101010101Z -config openssl.cnf -in root.csr -out root.cert
+openssl ca -startdate 600101010101Z -config openssl.cnf -in root.csr -out root.cert
 if [ -f root.cert ]; then
     rm root.csr
 fi
diff --git a/xCAT-server/share/xcat/scripts/setup-server-cert.sh b/xCAT-server/share/xcat/scripts/setup-server-cert.sh
index 42cb46767..77993358b 100755
--- a/xCAT-server/share/xcat/scripts/setup-server-cert.sh
+++ b/xCAT-server/share/xcat/scripts/setup-server-cert.sh
@@ -33,7 +33,7 @@ cd $XCATDIR/ca
 #   - call cmds directly instead - seems safe
 # make sign
 
-openssl ca -startdate 19600101010101Z -config openssl.cnf -in `hostname`.csr -out `hostname`.cert -extensions server
+openssl ca -startdate 600101010101Z -config openssl.cnf -in `hostname`.csr -out `hostname`.cert -extensions server
 if [ -f `hostname`.cert ]; then
     rm `hostname`.csr
 fi
diff --git a/xCAT-server/share/xcat/scripts/setup-xcat-ca.sh b/xCAT-server/share/xcat/scripts/setup-xcat-ca.sh
index cd13882db..463613d2b 100755
--- a/xCAT-server/share/xcat/scripts/setup-xcat-ca.sh
+++ b/xCAT-server/share/xcat/scripts/setup-xcat-ca.sh
@@ -34,5 +34,5 @@ make init
 openssl genrsa -out private/ca-key.pem 2048
 chmod 600 private/ca-key.pem
 openssl req -new -key private/ca-key.pem -config openssl.cnf -out ca-req.csr -subj /CN="$CNA" -outform PEM
-openssl ca -selfsign -keyfile private/ca-key.pem -in ca-req.csr -startdate 19700101010101Z -days 7305 -extensions v3_ca -config openssl.cnf -out ca-cert.pem
+openssl ca -selfsign -keyfile private/ca-key.pem -in ca-req.csr -startdate 700101010101Z -days 7305 -extensions v3_ca -config openssl.cnf -out ca-cert.pem
 cd -