diff --git a/nixos/modules/installer/tools/auto-upgrade.nix b/nixos/modules/installer/tools/auto-upgrade.nix
index dfb43d1a1db..a4d4f16d1d9 100644
--- a/nixos/modules/installer/tools/auto-upgrade.nix
+++ b/nixos/modules/installer/tools/auto-upgrade.nix
@@ -48,7 +48,7 @@ let cfg = config.system.autoUpgrade; in
         description = ''
           Specification (in the format described by
           <citerefentry><refentrytitle>systemd.time</refentrytitle>
-          <manvolnum>5</manvolnum></citerefentry>) of the time at
+          <manvolnum>7</manvolnum></citerefentry>) of the time at
           which the update will occur.
         '';
       };
diff --git a/nixos/modules/programs/venus.nix b/nixos/modules/programs/venus.nix
index 731ebed14c7..110570ac3f0 100644
--- a/nixos/modules/programs/venus.nix
+++ b/nixos/modules/programs/venus.nix
@@ -45,7 +45,7 @@ in
         description = ''
           Specification (in the format described by
           <citerefentry><refentrytitle>systemd.time</refentrytitle>
-          <manvolnum>5</manvolnum></citerefentry>) of the time at
+          <manvolnum>7</manvolnum></citerefentry>) of the time at
           which the Venus will collect feeds.
         '';
       };
diff --git a/nixos/modules/security/acme.nix b/nixos/modules/security/acme.nix
index 78bd09441f8..703d5ddbd0e 100644
--- a/nixos/modules/security/acme.nix
+++ b/nixos/modules/security/acme.nix
@@ -110,7 +110,7 @@ in
         description = ''
           Systemd calendar expression when to check for renewal. See
           <citerefentry><refentrytitle>systemd.time</refentrytitle>
-          <manvolnum>5</manvolnum></citerefentry>.
+          <manvolnum>7</manvolnum></citerefentry>.
         '';
       };
 
diff --git a/nixos/modules/services/logging/awstats.nix b/nixos/modules/services/logging/awstats.nix
index 8ab7e6acd98..612ae06d0a7 100644
--- a/nixos/modules/services/logging/awstats.nix
+++ b/nixos/modules/services/logging/awstats.nix
@@ -38,7 +38,7 @@ in
         Specification of the time at which awstats will get updated.
         (in the format described by <citerefentry>
           <refentrytitle>systemd.time</refentrytitle>
-          <manvolnum>5</manvolnum></citerefentry>)
+          <manvolnum>7</manvolnum></citerefentry>)
       '';
     };
 
diff --git a/nixos/modules/services/misc/nix-gc.nix b/nixos/modules/services/misc/nix-gc.nix
index 304168c65b0..8b493041b2c 100644
--- a/nixos/modules/services/misc/nix-gc.nix
+++ b/nixos/modules/services/misc/nix-gc.nix
@@ -26,7 +26,7 @@ in
         description = ''
           Specification (in the format described by
           <citerefentry><refentrytitle>systemd.time</refentrytitle>
-          <manvolnum>5</manvolnum></citerefentry>) of the time at
+          <manvolnum>7</manvolnum></citerefentry>) of the time at
           which the garbage collector will run.
         '';
       };
diff --git a/nixos/modules/services/misc/nix-optimise.nix b/nixos/modules/services/misc/nix-optimise.nix
index a76bfd9f1f1..295e7fb0ba0 100644
--- a/nixos/modules/services/misc/nix-optimise.nix
+++ b/nixos/modules/services/misc/nix-optimise.nix
@@ -26,7 +26,7 @@ in
         description = ''
           Specification (in the format described by
           <citerefentry><refentrytitle>systemd.time</refentrytitle>
-          <manvolnum>5</manvolnum></citerefentry>) of the time at
+          <manvolnum>7</manvolnum></citerefentry>) of the time at
           which the optimiser will run.
         '';
       };
diff --git a/nixos/modules/system/boot/systemd-unit-options.nix b/nixos/modules/system/boot/systemd-unit-options.nix
index 904e41b019f..9be10a8283e 100644
--- a/nixos/modules/system/boot/systemd-unit-options.nix
+++ b/nixos/modules/system/boot/systemd-unit-options.nix
@@ -328,7 +328,7 @@ in rec {
         Automatically start this unit at the given date/time, which
         must be in the format described in
         <citerefentry><refentrytitle>systemd.time</refentrytitle>
-        <manvolnum>5</manvolnum></citerefentry>.  This is equivalent
+        <manvolnum>7</manvolnum></citerefentry>.  This is equivalent
         to adding a corresponding timer unit with
         <option>OnCalendar</option> set to the value given here.
       '';
@@ -375,9 +375,9 @@ in rec {
         Each attribute in this set specifies an option in the
         <literal>[Timer]</literal> section of the unit.  See
         <citerefentry><refentrytitle>systemd.timer</refentrytitle>
-        <manvolnum>5</manvolnum></citerefentry> and
+        <manvolnum>7</manvolnum></citerefentry> and
         <citerefentry><refentrytitle>systemd.time</refentrytitle>
-        <manvolnum>5</manvolnum></citerefentry> for details.
+        <manvolnum>7</manvolnum></citerefentry> for details.
       '';
     };
 
diff --git a/nixos/modules/tasks/filesystems/zfs.nix b/nixos/modules/tasks/filesystems/zfs.nix
index d44209cfa0b..518fe0a97d2 100644
--- a/nixos/modules/tasks/filesystems/zfs.nix
+++ b/nixos/modules/tasks/filesystems/zfs.nix
@@ -234,7 +234,7 @@ in
         description = ''
           Systemd calendar expression when to scrub ZFS pools. See
           <citerefentry><refentrytitle>systemd.time</refentrytitle>
-          <manvolnum>5</manvolnum></citerefentry>.
+          <manvolnum>7</manvolnum></citerefentry>.
         '';
       };
 
diff --git a/nixos/modules/virtualisation/rkt.nix b/nixos/modules/virtualisation/rkt.nix
index c4c5cb3380e..98be4f680c3 100644
--- a/nixos/modules/virtualisation/rkt.nix
+++ b/nixos/modules/virtualisation/rkt.nix
@@ -22,7 +22,7 @@ in
         description = ''
           Specification (in the format described by
           <citerefentry><refentrytitle>systemd.time</refentrytitle>
-          <manvolnum>5</manvolnum></citerefentry>) of the time at
+          <manvolnum>7</manvolnum></citerefentry>) of the time at
           which the garbage collector will run.
         '';
       };