diff --git a/authorities/authorities.pl b/authorities/authorities.pl
index da4eec62ee..e016da793d 100755
--- a/authorities/authorities.pl
+++ b/authorities/authorities.pl
@@ -637,6 +637,17 @@ if ($op eq "add") {
 } else {
     if ( $op eq "duplicate" ) {
         $authid = "";
+        if ( C4::Context->preference('marcflavour') eq 'MARC21' && $record->field('008') ) {
+            my $s008 = $record->field('008')->data;
+            my $date = POSIX::strftime( "%y%m%d", localtime );
+            substr( $s008, 0, 6, $date );
+            $record->field('008')->update($s008);
+        } elsif ( C4::Context->preference('marcflavour') eq 'UNIMARC' && $record->subfield( '100', 'a' ) ) {
+            my $s100a = $record->subfield( '100', 'a' );
+            my $date  = POSIX::strftime( "%Y%m%d", localtime );
+            substr( $s100a, 0, 8, $date );
+            $record->field('100')->update( a => $s100a );
+        }
     }
 
     if ( $changed_authtype eq "changed" ) {
diff --git a/cataloguing/addbiblio.pl b/cataloguing/addbiblio.pl
index e84c542092..bd6b9dc3d9 100755
--- a/cataloguing/addbiblio.pl
+++ b/cataloguing/addbiblio.pl
@@ -602,6 +602,19 @@ if ( $record && $op eq 'duplicate' &&
     my @control_num = $record->field('001');
     $record->delete_fields(@control_num);
 }
+if ( $record && $op eq 'duplicate' ) {
+    if ( C4::Context->preference('marcflavour') eq 'MARC21' && $record->field('008') ) {
+        my $s008 = $record->field('008')->data;
+        my $date = POSIX::strftime( "%y%m%d", localtime );
+        substr( $s008, 0, 6, $date );
+        $record->field('008')->update($s008);
+    } elsif ( C4::Context->preference('marcflavour') eq 'UNIMARC' && $record->subfield( '100', 'a' ) ) {
+        my $s100a = $record->subfield( '100', 'a' );
+        my $date  = POSIX::strftime( "%Y%m%d", localtime );
+        substr( $s100a, 0, 8, $date );
+        $record->field('100')->update( a => $s100a );
+    }
+}
 #populate hostfield if hostbiblionumber is available
 if ($hostbiblionumber) {
     my $marcflavour = C4::Context->preference("marcflavour");