diff --git a/.grenrc.js b/.grenrc.js
new file mode 100644
index 0000000000..e54898653c
--- /dev/null
+++ b/.grenrc.js
@@ -0,0 +1,36 @@
+module.exports = {
+  changelogFilename: "CHANGELOG.md",
+  dataSource: "milestones",
+  groupBy: {
+    "Enhancements": [
+      "feature",
+    ],
+    "Bug Fixes": [
+      "bug"
+    ],
+    "Maintenance": [
+      "task",
+    ],
+    "Uncategorised": [
+      "closed",
+    ],
+  },
+  ignoreLabels: [
+    "discussion",
+    "documentation",
+    "duplicate",
+    "hugo",
+    "invalid",
+    "support",
+    "wontfix",
+  ],
+  ignoreTagsWith: [
+    "Relearn",
+  ],
+  milestoneMatch: "{{tag_name}}",
+  onlyMilestones: true,
+  template: {
+    group: "\n### {{heading}}\n",
+    release: ({ body, date, release }) => `## ${release} (` + date.replace( /(\d+)\/(\d+)\/(\d+)/, '$3-$2-$1' ) + `)\n${body}`,
+  },
+};
diff --git a/.grenrc.yml b/.grenrc.yml
deleted file mode 100644
index 7e3a325a23..0000000000
--- a/.grenrc.yml
+++ /dev/null
@@ -1,24 +0,0 @@
----
-  dataSource: "milestones"
-  onlyMilestones: true
-  milestoneMatch: "{{tag_name}}"
-  template:
-    group: "\n### {{heading}}\n"
-  changelogFilename: "CHANGELOG.md"
-  ignore-tags-with:
-    - "Relearn"
-  ignoreLabels:
-    - "documentation"
-    - "duplicate"
-    - "invalid"
-    - "support"
-    - "wontfix"
-  groupBy:
-    Bug Fixes:
-      - "bug"
-    New features:
-      - "feature"
-    Maintenance:
-      - "task"
-    Uncategorised:
-      - "closed"
diff --git a/CHANGELOG.md b/CHANGELOG.md
index d02f659d7f..fc45b02017 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,15 +1,8 @@
 # Changelog
 
-## 1.2.0 (26/07/2021)
+## 1.2.0 (2021-07-26)
 
-### Bug Fixes
-
-- [**bug**] dependency: upgrade jquery to 3.6.0 [#30](https://github.com/McShelby/hugo-theme-relearn/issues/30)
-- [**bug**] attachments: support i18n for attachment size [#21](https://github.com/McShelby/hugo-theme-relearn/issues/21)
-- [**bug**] notice: support i18n for box labels [#16](https://github.com/McShelby/hugo-theme-relearn/issues/16)
-- [**bug**] notice: support multiple blocks in one box [#15](https://github.com/McShelby/hugo-theme-relearn/issues/15)
-
-### New features
+### Enhancements
 
 - [**feature**] theme: adjust copy-to-clipboard [#29](https://github.com/McShelby/hugo-theme-relearn/issues/29)
 - [**feature**] attachments: adjust style with notice boxes [#28](https://github.com/McShelby/hugo-theme-relearn/issues/28)
@@ -22,9 +15,16 @@
 - [**feature**] notice: align box colors to common standards [#18](https://github.com/McShelby/hugo-theme-relearn/issues/18)
 - [**feature**] notice: use distinct icons for notice box type [#17](https://github.com/McShelby/hugo-theme-relearn/issues/17)
 
+### Bug Fixes
+
+- [**bug**] dependency: upgrade jquery to 3.6.0 [#30](https://github.com/McShelby/hugo-theme-relearn/issues/30)
+- [**bug**] attachments: support i18n for attachment size [#21](https://github.com/McShelby/hugo-theme-relearn/issues/21)
+- [**bug**] notice: support i18n for box labels [#16](https://github.com/McShelby/hugo-theme-relearn/issues/16)
+- [**bug**] notice: support multiple blocks in one box [#15](https://github.com/McShelby/hugo-theme-relearn/issues/15)
+
 ---
 
-## 1.1.1 (04/07/2021)
+## 1.1.1 (2021-07-04)
 
 ### Maintenance
 
@@ -32,7 +32,11 @@
 
 ---
 
-## 1.1.0 (02/07/2021)
+## 1.1.0 (2021-07-02)
+
+### Enhancements
+
+- [**feature**] mermaid: expose options in config.toml [#4](https://github.com/McShelby/hugo-theme-relearn/issues/4)
 
 ### Bug Fixes
 
@@ -42,17 +46,13 @@
 - [**bug**] mermaid: code fences not always rendered [#6](https://github.com/McShelby/hugo-theme-relearn/issues/6)
 - [**bug**] mermaid: search term on load may bomb chart [#5](https://github.com/McShelby/hugo-theme-relearn/issues/5)
 
-### New features
-
-- [**feature**] mermaid: expose options in config.toml [#4](https://github.com/McShelby/hugo-theme-relearn/issues/4)
-
 ### Maintenance
 
 - [**task**] mermaid: update to 8.10.2 [#7](https://github.com/McShelby/hugo-theme-relearn/issues/7)
 
 ---
 
-## 1.0.1 (01/07/2021)
+## 1.0.1 (2021-07-01)
 
 ### Maintenance
 
@@ -60,7 +60,7 @@
 
 ---
 
-## 1.0.0 (01/07/2021)
+## 1.0.0 (2021-07-01)
 
 ### Maintenance