diff --git a/CHANGELOG.md b/CHANGELOG.md
index 22e9170e..5bb1a42d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -14,6 +14,7 @@
 - [#434](https://github.com/estruyf/vscode-front-matter/issues/434): Webview errors are logged in the extension output
 - [#447](https://github.com/estruyf/vscode-front-matter/issues/447): Allow to use placeholders on git commit messages
 - [#449](https://github.com/estruyf/vscode-front-matter/issues/449): Show `filename` if the `title` is not set
+- [#450](https://github.com/estruyf/vscode-front-matter/issues/450): Additional time placeholders added `{{hour12}}`, `{{hour24}}`, `{{ampm}}`, and `{{minute}}`
 
 ### ⚡️ Optimizations
 
diff --git a/src/helpers/PlaceholderHelper.ts b/src/helpers/PlaceholderHelper.ts
index f1fa404c..c316e1b7 100644
--- a/src/helpers/PlaceholderHelper.ts
+++ b/src/helpers/PlaceholderHelper.ts
@@ -8,16 +8,16 @@ import { SlugHelper } from "./SlugHelper";
  * @param title 
  * @returns 
  */
-export const processKnownPlaceholders = (value: string, title: string, dateFormat: string) => {
+export const processKnownPlaceholders = (value: string, title: string | undefined, dateFormat: string) => {
   if (value && typeof value === "string") {
     if (value.includes("{{title}}")) {
       const regex = new RegExp("{{title}}", "g");
-      value = value.replace(regex, title);
+      value = value.replace(regex, title || "");
     }
     
     if (value.includes("{{slug}}")) {
       const regex = new RegExp("{{slug}}", "g");
-      value = value.replace(regex, SlugHelper.createSlug(title) || "");
+      value = value.replace(regex, SlugHelper.createSlug(title || "") || "");
     }
 
     if (value.includes("{{now}}")) {
@@ -26,7 +26,7 @@ export const processKnownPlaceholders = (value: string, title: string, dateForma
       if (dateFormat && typeof dateFormat === "string") {
         value = value.replace(regex, format(new Date(), DateHelper.formatUpdate(dateFormat) as string));
       } else {
-        return (new Date()).toISOString();
+        value = value.replace(regex, (new Date()).toISOString());
       }
     }
 
@@ -44,6 +44,26 @@ export const processKnownPlaceholders = (value: string, title: string, dateForma
       const regex = new RegExp("{{day}}", "g");
       value = value.replace(regex, format(new Date(), "dd"));
     }
+
+    if (value.includes("{{hour12}}")) {
+      const regex = new RegExp("{{hour12}}", "g");
+      value = value.replace(regex, format(new Date(), "hh"));
+    }
+
+    if (value.includes("{{hour24}}")) {
+      const regex = new RegExp("{{hour24}}", "g");
+      value = value.replace(regex, format(new Date(), "HH"));
+    }
+
+    if (value.includes("{{ampm}}")) {
+      const regex = new RegExp("{{ampm}}", "g");
+      value = value.replace(regex, format(new Date(), "aaa"));
+    }
+
+    if (value.includes("{{minute}}")) {
+      const regex = new RegExp("{{minute}}", "g");
+      value = value.replace(regex, format(new Date(), "mm"));
+    }
   }
 
   return value;