diff --git a/sanoid b/sanoid
index d6e58ce..9b6c815 100755
--- a/sanoid
+++ b/sanoid
@@ -121,15 +121,16 @@ sub monitor_snapshots {
 		my $path = $config{$section}{'path'};
 		push @paths, $path;
 
-		my @types = ('yearly','monthly','daily','hourly');
+		my @types = ('yearly','monthly', 'weekly', 'daily','hourly');
 		foreach my $type (@types) {
 
 			my $smallerperiod = 0;
 			# we need to set the period length in seconds first
 			if ($type eq 'hourly') { $smallerperiod = 60; }
 			elsif ($type eq 'daily') { $smallerperiod = 60*60; }
-			elsif ($type eq 'monthly') { $smallerperiod = 60*60*24; }
-			elsif ($type eq 'yearly') { $smallerperiod = 60*60*24; }
+			elsif ($type eq 'weekly') { $smallerperiod = 60*60*24; }
+			elsif ($type eq 'monthly') { $smallerperiod = 60*60*24*7; }
+			elsif ($type eq 'yearly') { $smallerperiod = 60*60*24*31; }
 
 			my $typewarn = $type . '_warn';
 			my $typecrit = $type . '_crit';
@@ -202,6 +203,7 @@ sub prune_snapshots {
 			# we need to set the period length in seconds first
 			if ($type eq 'hourly') { $period = 60*60; }
 			elsif ($type eq 'daily') { $period = 60*60*24; }
+			elsif ($type eq 'weekly') { $period = 60*60*24*7; }
 			elsif ($type eq 'monthly') { $period = 60*60*24*31; }
 			elsif ($type eq 'yearly') { $period = 60*60*24*365.25; }
 
@@ -309,6 +311,24 @@ sub take_snapshots {
 					push @preferredtime,$datestamp{'year'};
 					$lastpreferred = timelocal(@preferredtime);
 					if ($lastpreferred > time()) { $lastpreferred -= 60*60*24; } # preferred time is later today - so look at yesterday's
+				} elsif ($type eq 'weekly')   {
+					# calculate offset in seconds for the desired weekday
+					my $offset;
+					if ($config{$section}{'weekly_wday'} < $datestamp{'wday'}) {
+						$offset += 6;
+					}
+					$offset += $config{$section}{'weekly_wday'} - $datestamp{'wday'};
+					$offset *= 60*60*24; # full day
+
+					push @preferredtime,0; # try to hit 0 seconds
+					push @preferredtime,$config{$section}{'weekly_min'};
+					push @preferredtime,$config{$section}{'weekly_hour'};
+					push @preferredtime,$datestamp{'mday'};
+					push @preferredtime,($datestamp{'mon'}-1); # january is month 0
+					push @preferredtime,$datestamp{'year'};
+					$lastpreferred = timelocal(@preferredtime);
+					$lastpreferred -= $offset;
+					if ($lastpreferred > time()) { $lastpreferred -= 60*60*24*7; } # preferred time is later today - so look at yesterday's
 				} elsif ($type eq 'monthly') {
 					push @preferredtime,0; # try to hit 0 seconds
 					push @preferredtime,$config{$section}{'monthly_min'};
diff --git a/sanoid.defaults.conf b/sanoid.defaults.conf
index 35c804d..7187104 100644
--- a/sanoid.defaults.conf
+++ b/sanoid.defaults.conf
@@ -24,6 +24,7 @@ process_children_only =
 autoprune = yes
 hourly = 48
 daily = 90
+weekly = 0
 monthly = 6
 yearly = 0
 min_percent_free = 10
@@ -40,6 +41,10 @@ hourly_min = 0
 # daily - at 23:59 (most people expect a daily to contain everything done DURING that day)
 daily_hour = 23
 daily_min = 59
+# weekly -at 23:30 each Monday
+weekly_wday = 1
+weekly_hour = 23
+weekly_min = 30
 # monthly - immediately at the beginning of the month (ie 00:00 of day 1)
 monthly_mday = 1
 monthly_hour = 0
@@ -66,7 +71,9 @@ hourly_warn = 90
 hourly_crit = 360
 daily_warn = 28
 daily_crit = 32
-monthly_warn = 32
-monthly_crit = 35
+weekly_warn = 7
+weekly_crit = 10
+monthly_warn = 5
+monthly_crit = 6
 yearly_warn = 0
 yearly_crit = 0