next unless  /Synchronizing started|Synchronizing finished|Summary/;
my @date= m|(\d+)/(\d+)/(\d+)|;

##</code><code>##

my @date;
if (@date = m{(\d+)/(\d+)/(\d+)}) {
  ...
}

##</code><code>##

my %times;
my $job;
while (<FH1>) {
  next unless (s{^\[(\d+/\d+/\d+ \d+:\d+:\d+)\]\s*}{}); # malformed line
  my $timestamp = $1;
  if (m/^(Synchonization|Analyzing) (started|finished), job: "(.*?)"/) {
    $job = $3;
    $times{$job}->{$1}->{$2} = $timestamp;
  } elsif (m/^Summary:/) {
    $times{$job}->{summary} = $_;
  }
}
print Dumper(\%times); use Data::Dumper;