diff --git a/doc/release_new_version b/doc/release_new_version
index bd8ebe28..f78ae7ea 100644
--- a/doc/release_new_version
+++ b/doc/release_new_version
@@ -214,10 +214,24 @@ New in this release:
   http://meta.askubuntu.com/a/16750/22307
   http://meta.serverfault.com/a/9040/45704
 
+http://journal.frontiersin.org/article/10.3389/fncom.2017.00021/full#B18
+
+https://www.cyberciti.biz/faq/how-to-run-command-or-code-in-parallel-in-bash-shell-under-linux-or-unix/
+
 https://github.com/jupiter126/Create_Speech_Dataset
 
 http://pubs.rsc.org/-/content/articlelanding/2017/cp/c7cp01662j#!divAbstract
 
+http://www.hpc.lsu.edu/training/weekly-materials/2017-Spring/gnuparallel-Feb2017.pdf
+
+https://joeray.me/gnu-parallel-how-to-list-millions-objects.html
+
+http://amedee.me/gnu-parallel-is-my-new-toaster/index.html
+
+http://arjon.es/2017/05/11/which-is-the-best-tool-for-copying-a-large-directory-tree-locally/
+
+https://github.com/faroit/dsdtools
+
 ftp://frapftp.fire.ca.gov/outgoing/transfer/PUC_Map1/Utility%20Fire%20map%201%20final%20review%20and%20development%20report21616.pdf
 
 https://dzone.com/articles/batch-convert-images-from-png-to-jpeg
diff --git a/src/parallel b/src/parallel
index 0f1befb1..110e1f47 100755
--- a/src/parallel
+++ b/src/parallel
@@ -977,7 +977,7 @@ sub options_hash {
 	 "tty" => \$opt::tty,
 	 "T" => \$opt::retired,
 	 "H=i" => \$opt::retired,
-	 "dry-run|dryrun" => \$opt::dryrun,
+	 "dry-run|dryrun|dr" => \$opt::dryrun,
 	 "progress" => \$opt::progress,
 	 "eta" => \$opt::eta,
 	 "bar" => \$opt::bar,
@@ -1317,7 +1317,8 @@ sub parse_options {
 }
 
 sub check_invalid_option_combinations {
-    if(defined $opt::timeout and $opt::timeout !~ /^\d+(\.\d+)?%?$/) {
+    if(defined $opt::timeout and
+       $opt::timeout !~ /^\d+(\.\d+)?%?$|^(\d+(\.\d+)?[dhms])+$/i) {
 	::error("--timeout must be seconds or percentage.");
 	wait_and_exit(255);
     }
@@ -1370,7 +1371,7 @@ sub check_invalid_option_combinations {
 
 sub init_globals {
     # Defaults:
-    $Global::version = 20170423;
+    $Global::version = 20170512;
     $Global::progname = 'parallel';
     $Global::infinity = 2**31;
     $Global::debug = 0;
@@ -10571,6 +10572,13 @@ sub new {
 	$pct = $1/100;
 	$delta_time = 1_000_000;
     }
+    if($delta_time =~ /[dhms]/i) {
+	$delta_time =~ s/s/*1+/gi;
+	$delta_time =~ s/m/*60+/gi;
+	$delta_time =~ s/h/*3600+/gi;
+	$delta_time =~ s/d/*86400+/gi;
+	$delta_time = eval $delta_time."0";
+    }
     return bless {
 	'queue' => [],
 	'delta_time' => $delta_time,
diff --git a/src/parallel.pod b/src/parallel.pod
index 790b566a..a9161237 100644
--- a/src/parallel.pod
+++ b/src/parallel.pod
@@ -2290,15 +2290,20 @@ Useful if you want to monitor the progress of less than 100 concurrent
 jobs.
 
 
-=item B<--timeout> I<secs>
+=item B<--timeout> I<duration>
 
-Time out for command. If the command runs for longer than I<secs>
+Time out for command. If the command runs for longer than I<duration>
 seconds it will get killed as per B<--termseq>.
 
-If I<secs> is followed by a % then the timeout will dynamically be
+If I<duration> is followed by a % then the timeout will dynamically be
 computed as a percentage of the median average runtime of successful
 jobs. Only values > 100% will make sense.
 
+I<duration> is normally in seconds, but can be floats postfixed with
+s, m, h, or d which would multiply the float by 1, 60, 3600, or
+86400. Thus these are equivalent: B<--timeout 100000> and B<--timeout
+1d3h46.6m4s>.
+
 
 =item B<--verbose>
 
diff --git a/testsuite/tests-to-run/parallel-local-100s.sh b/testsuite/tests-to-run/parallel-local-100s.sh
index b3dd7c09..1d627bbf 100644
--- a/testsuite/tests-to-run/parallel-local-100s.sh
+++ b/testsuite/tests-to-run/parallel-local-100s.sh
@@ -74,6 +74,14 @@ par_mem_leak() {
     fi
 }
 
+par_timeout() {
+    echo "### test --timeout"
+    stdout time -f %e parallel --timeout 1s sleep ::: 10 |
+	perl -ne '1 < $_ and $_ < 10 and print "OK\n"'
+    stdout time -f %e parallel --timeout 1m sleep ::: 100 |
+	perl -ne '10 < $_ and $_ < 100 and print "OK\n"'
+}
+
 
 export -f $(compgen -A function | grep par_)
 compgen -A function | grep par_ | sort | parallel -vj0 -k --tag --joblog /tmp/jl-`basename $0` '{} 2>&1'
diff --git a/testsuite/wanted-results/parallel-local-100s b/testsuite/wanted-results/parallel-local-100s
index 126ce0e1..be15e88a 100644
--- a/testsuite/wanted-results/parallel-local-100s
+++ b/testsuite/wanted-results/parallel-local-100s
@@ -19,3 +19,7 @@ par_retries_unreachable	echo 1
 par_retries_unreachable	1
 par_retries_unreachable	echo 2
 par_retries_unreachable	2
+par_timeout 2>&1
+par_timeout	### test --timeout
+par_timeout	OK
+par_timeout	OK