diff --git a/Changes b/Changes
index 469dc6cdd..7b0875cd1 100644
--- a/Changes
+++ b/Changes
@@ -40,6 +40,7 @@ netdiscovery/netinventory:
 * fix #769: Added Intelbras devices support
 * don't send discovery xml to server target for remoteinventory task event initiated
   from toolbox
+* fix #781: Filter invalid firmware date on HP peripherals
 
 deploy:
 * Fix checks on command run and clarify reason of success or failure. This fixes
diff --git a/lib/GLPI/Agent/SNMP/Device.pm b/lib/GLPI/Agent/SNMP/Device.pm
index 33b6075b9..4799baf00 100644
--- a/lib/GLPI/Agent/SNMP/Device.pm
+++ b/lib/GLPI/Agent/SNMP/Device.pm
@@ -144,7 +144,7 @@ sub getFirmwareDateByMibSupport {
 
     return unless $self->{MIBSUPPORT};
 
-    return $self->{MIBSUPPORT}->getMethod('getFirmwareDate');
+    return getCanonicalDate($self->{MIBSUPPORT}->getMethod('getFirmwareDate'));
 }
 
 sub getMacAddressByMibSupport {
@@ -333,7 +333,7 @@ sub setFirmware {
         NAME            => $self->{MODEL} || 'device',
         DESCRIPTION     => 'device firmware',
         TYPE            => 'device',
-        DATE            => $self->getFirmwareDateByMibSupport(),
+        DATE            => $self->getFirmwareDateByMibSupport() // undef,
         VERSION         => $self->{FIRMWARE},
         MANUFACTURER    => $self->{MANUFACTURER}
     });
diff --git a/lib/GLPI/Agent/Tools/SNMP.pm b/lib/GLPI/Agent/Tools/SNMP.pm
index b074aff09..7955abb37 100644
--- a/lib/GLPI/Agent/Tools/SNMP.pm
+++ b/lib/GLPI/Agent/Tools/SNMP.pm
@@ -15,6 +15,7 @@ our @EXPORT = qw(
     getCanonicalConstant
     getCanonicalMemory
     getCanonicalCount
+    getCanonicalDate
     isInteger
     getRegexpOidMatch
 );
@@ -150,6 +151,63 @@ sub getRegexpOidMatch {
     return qr/^$match/;
 }
 
+my %M = qw(Jan 1 Feb 2 Mar 3 Apr 4 May 5 Jun 6 Jul 7 Aug 8 Sep 9 Oct 10 Nov 11 Dec 12);
+my $months = join('|', keys(%M));
+my $days   = "Mon|Tue|Wed|Thu|Fri|Sat|Sun";
+my $first  = join("|", map { "0?$_" } 1..9);
+my $month  = join("|", $first, 10..12);
+my $month2 = join("|", map { sprintf("%02d", $_) } 1..12);
+my $day    = join("|", $first, 10..31);
+my $day2   = join("|", map { sprintf("%02d", $_) } 1..31);
+my $hour   = join("|", map { sprintf("%02d", $_) } 0..23);
+my $min    = join("|", map { sprintf("%02d", $_) } 0..59);
+my $sec    = $min;
+my $year   = "[1-9][0-9]{3}";
+
+# Return date if possible
+sub getCanonicalDate {
+    my ($value) = @_;
+
+    return if empty($value);
+
+    # Match on 'D M d H:i:s Y'
+    if ($value =~ /^(?:$days) ($months) +($day) (?:$hour):(?:$min):(?:$sec) .*($year)$/) {
+        return sprintf("%4d-%02d-%02d", $3, $M{$1}, $2);
+    }
+
+    # Match 'D M d, Y H:i:s' as in "Wed Aug 01, 2012 05:50:43PM"
+    if ($value =~ /^(?:$days) ($months) +($day), ($year) /) {
+        return sprintf("%4d-%02d-%02d", $3, $M{$1}, $2);
+    }
+
+    # Match on 'Y-m-d\TH:i:sZ' and others with same prefix
+    if ($value =~ /^($year)-($month)-($day)/) {
+        return sprintf("%4d-%02d-%02d", $1, $2, $3);
+    }
+
+    # Match on 'd/m/Y H:i:s' and others
+    if ($value =~ m{^($day)/($month)/($year)} ) {
+        return sprintf("%4d-%02d-%02d", $3, $2, $1);
+    }
+
+    # Match on 'm/d/Y'
+    if ($value =~ m{^($month)/($day)/($year)} ) {
+        return sprintf("%4d-%02d-%02d", $3, $1, $2);
+    }
+
+    # Match on 'd.m.Y'
+    if ($value =~ /^($day)\.($month)\.($year)/ ) {
+        return sprintf("%4d-%02d-%02d", $3, $2, $1);
+    }
+
+    # Match on 'Ymd'
+    if ($value =~ /^($year)($month2)($day2)$/ ) {
+        return sprintf("%4d-%02d-%02d", $1, $2, $3);
+    }
+
+    return;
+}
+
 1;
 __END__