diff --git a/browser/components/MarkdownEditor.js b/browser/components/MarkdownEditor.js
index aa96195a..9fcb8b3f 100644
--- a/browser/components/MarkdownEditor.js
+++ b/browser/components/MarkdownEditor.js
@@ -321,7 +321,6 @@ class MarkdownEditor extends React.Component {
           switchPreview={config.editor.switchPreview}
           enableMarkdownLint={config.editor.enableMarkdownLint}
           customMarkdownLintConfig={config.editor.customMarkdownLintConfig}
-          // dateISO8601={config.ui.dateFormatISO8601}
           dateFormatISO8601={config.editor.dateFormatISO8601}
         />
         <MarkdownPreview styleName={this.state.status === 'PREVIEW'
diff --git a/browser/components/MarkdownSplitEditor.js b/browser/components/MarkdownSplitEditor.js
index 0777914b..da19445f 100644
--- a/browser/components/MarkdownSplitEditor.js
+++ b/browser/components/MarkdownSplitEditor.js
@@ -181,7 +181,6 @@ class MarkdownSplitEditor extends React.Component {
           switchPreview={config.editor.switchPreview}
           enableMarkdownLint={config.editor.enableMarkdownLint}
           customMarkdownLintConfig={config.editor.customMarkdownLintConfig}
-          // dateISO8601={config.ui.dateFormatISO8601}
           dateFormatISO8601={config.editor.dateFormatISO8601}
        />
         <div styleName='slider' style={{left: this.state.codeEditorWidthInPercent + '%'}} onMouseDown={e => this.handleMouseDown(e)} >
diff --git a/browser/main/Detail/SnippetNoteDetail.js b/browser/main/Detail/SnippetNoteDetail.js
index f43b0976..35440190 100644
--- a/browser/main/Detail/SnippetNoteDetail.js
+++ b/browser/main/Detail/SnippetNoteDetail.js
@@ -738,7 +738,6 @@ class SnippetNoteDetail extends React.Component {
             enableSmartPaste={config.editor.enableSmartPaste}
             hotkey={config.hotkey}
             autoDetect={autoDetect}
-            // dateISO8601={config.ui.dateFormatISO8601}
             dateFormatISO8601={config.editor.dateFormatISO8601}
           />
         }
diff --git a/browser/main/lib/ConfigManager.js b/browser/main/lib/ConfigManager.js
index e92e054b..e85cb8c1 100644
--- a/browser/main/lib/ConfigManager.js
+++ b/browser/main/lib/ConfigManager.js
@@ -40,7 +40,6 @@ export const DEFAULT_CONFIG = {
     disableDirectWrite: false,
     defaultNote: 'ALWAYS_ASK', // 'ALWAYS_ASK', 'SNIPPET_NOTE', 'MARKDOWN_NOTE'
     showMenuBar: false
-    // dateFormatISO8601: false
   },
   editor: {
     theme: 'base16-light',
diff --git a/browser/main/modals/PreferencesModal/UiTab.js b/browser/main/modals/PreferencesModal/UiTab.js
index 7d16f390..021ccf37 100644
--- a/browser/main/modals/PreferencesModal/UiTab.js
+++ b/browser/main/modals/PreferencesModal/UiTab.js
@@ -78,7 +78,6 @@ class UiTab extends React.Component {
         saveTagsAlphabetically: this.refs.saveTagsAlphabetically.checked,
         enableLiveNoteCounts: this.refs.enableLiveNoteCounts.checked,
         showMenuBar: this.refs.showMenuBar.checked,
-        // dateFormatISO8601: this.refs.dateFormatISO8601.checked,
         disableDirectWrite: this.refs.uiD2w != null
           ? this.refs.uiD2w.checked
           : false
@@ -295,16 +294,7 @@ class UiTab extends React.Component {
             </div>
             : null
           }
-          {/* <div styleName='group-checkBoxSection'>
-            <label>
-              <input onChange={(e) => this.handleUIChange(e)}
-                checked={this.state.config.ui.dateFormatISO8601}
-                ref='dateFormatISO8601'
-                type='checkbox'
-              />&nbsp;
-              {i18n.__('Date shortcut use iso 8601 format')}
-            </label>
-          </div> */}
+
           <div styleName='group-header2'>Tags</div>
 
           <div styleName='group-checkBoxSection'>