diff --git a/.github/CONTRIBUTING.md b/.github/CONTRIBUTING.md
index a50a8a507de..ae4f68dddc1 100644
--- a/.github/CONTRIBUTING.md
+++ b/.github/CONTRIBUTING.md
@@ -53,9 +53,9 @@ For package version upgrades and such a one-line commit message is usually suffi
 To [backport a change into a release branch](https://nixos.org/nixpkgs/manual/#submitting-changes-stable-release-branches):
 
 1. Take note of the commit in which the change was introduced into `master`.
-2. Check out the target _release branch_, e.g. `release-19.09`. Do not use a _channel branch_ like `nixos-19.09` or `nixpkgs-19.09`.
+2. Check out the target _release branch_, e.g. `release-20.03`. Do not use a _channel branch_ like `nixos-20.03` or `nixpkgs-20.03`.
 3. Use `git cherry-pick -x <original commit>`.
-4. Open your backport PR. Make sure to select the release branch (e.g. `release-19.09`) as the target branch of the PR, and link to the PR in which the original change was made to `master`.
+4. Open your backport PR. Make sure to select the release branch (e.g. `release-20.03`) as the target branch of the PR, and link to the PR in which the original change was made to `master`.
 
 ## Reviewing contributions
 
diff --git a/README.md b/README.md
index edcd8dc0a00..da38b227b56 100644
--- a/README.md
+++ b/README.md
@@ -45,9 +45,9 @@ Nixpkgs and NixOS are built and tested by our continuous integration
 system, [Hydra](https://hydra.nixos.org/).
 
 * [Continuous package builds for unstable/master](https://hydra.nixos.org/jobset/nixos/trunk-combined)
-* [Continuous package builds for the NixOS 19.09 release](https://hydra.nixos.org/jobset/nixos/release-19.09)
+* [Continuous package builds for the NixOS 20.03 release](https://hydra.nixos.org/jobset/nixos/release-20.03)
 * [Tests for unstable/master](https://hydra.nixos.org/job/nixos/trunk-combined/tested#tabs-constituents)
-* [Tests for the NixOS 19.09 release](https://hydra.nixos.org/job/nixos/release-19.09/tested#tabs-constituents)
+* [Tests for the NixOS 20.03 release](https://hydra.nixos.org/job/nixos/release-20.03/tested#tabs-constituents)
 
 Artifacts successfully built with Hydra are published to cache at
 https://cache.nixos.org/. When successful build and test criteria are
diff --git a/nixos/doc/manual/installation/upgrading.xml b/nixos/doc/manual/installation/upgrading.xml
index 92864cf2557..e5e02aa0752 100644
--- a/nixos/doc/manual/installation/upgrading.xml
+++ b/nixos/doc/manual/installation/upgrading.xml
@@ -14,7 +14,7 @@
     <para>
      <emphasis>Stable channels</emphasis>, such as
      <literal
-    xlink:href="https://nixos.org/channels/nixos-19.09">nixos-19.09</literal>.
+    xlink:href="https://nixos.org/channels/nixos-20.03">nixos-20.03</literal>.
      These only get conservative bug fixes and package upgrades. For instance,
      a channel update may cause the Linux kernel on your system to be upgraded
      from 4.19.34 to 4.19.38 (a minor bug fix), but not from
@@ -38,7 +38,7 @@
     <para>
      <emphasis>Small channels</emphasis>, such as
      <literal
-    xlink:href="https://nixos.org/channels/nixos-19.09-small">nixos-19.09-small</literal>
+    xlink:href="https://nixos.org/channels/nixos-20.03-small">nixos-20.03-small</literal>
      or
      <literal
     xlink:href="https://nixos.org/channels/nixos-unstable-small">nixos-unstable-small</literal>.
@@ -63,8 +63,8 @@
  <para>
   When you first install NixOS, you’re automatically subscribed to the NixOS
   channel that corresponds to your installation source. For instance, if you
-  installed from a 19.09 ISO, you will be subscribed to the
-  <literal>nixos-19.09</literal> channel. To see which NixOS channel you’re
+  installed from a 20.03 ISO, you will be subscribed to the
+  <literal>nixos-20.03</literal> channel. To see which NixOS channel you’re
   subscribed to, run the following as root:
 <screen>
 # nix-channel --list | grep nixos
@@ -75,13 +75,13 @@ nixos https://nixos.org/channels/nixos-unstable
 # nix-channel --add https://nixos.org/channels/<replaceable>channel-name</replaceable> nixos
 </screen>
   (Be sure to include the <literal>nixos</literal> parameter at the end.) For
-  instance, to use the NixOS 19.09 stable channel:
+  instance, to use the NixOS 20.03 stable channel:
 <screen>
-# nix-channel --add https://nixos.org/channels/nixos-19.09 nixos
+# nix-channel --add https://nixos.org/channels/nixos-20.03 nixos
 </screen>
   If you have a server, you may want to use the “small” channel instead:
 <screen>
-# nix-channel --add https://nixos.org/channels/nixos-19.09-small nixos
+# nix-channel --add https://nixos.org/channels/nixos-20.03-small nixos
 </screen>
   And if you want to live on the bleeding edge:
 <screen>
@@ -132,7 +132,7 @@ nixos https://nixos.org/channels/nixos-unstable
    kernel, initrd or kernel modules.
    You can also specify a channel explicitly, e.g.
 <programlisting>
-<xref linkend="opt-system.autoUpgrade.channel"/> = https://nixos.org/channels/nixos-19.09;
+<xref linkend="opt-system.autoUpgrade.channel"/> = https://nixos.org/channels/nixos-20.03;
 </programlisting>
   </para>
  </section>
diff --git a/nixos/doc/manual/release-notes/rl-2003.xml b/nixos/doc/manual/release-notes/rl-2003.xml
index 8f97de24ab1..b0940391b56 100644
--- a/nixos/doc/manual/release-notes/rl-2003.xml
+++ b/nixos/doc/manual/release-notes/rl-2003.xml
@@ -3,7 +3,7 @@
          xmlns:xi="http://www.w3.org/2001/XInclude"
          version="5.0"
          xml:id="sec-release-20.03">
- <title>Release 20.03 (“Markhor”, 2020.03/??)</title>
+ <title>Release 20.03 (“Markhor”, 2020.04/20)</title>
 
  <section xmlns="http://docbook.org/ns/docbook"
          xmlns:xlink="http://www.w3.org/1999/xlink"