diff --git a/assets/javascripts/discourse/components/wizard-realtime-validations.js.es6 b/assets/javascripts/discourse/components/wizard-realtime-validations.js.es6
index 5bafaac3..c4b35d5c 100644
--- a/assets/javascripts/discourse/components/wizard-realtime-validations.js.es6
+++ b/assets/javascripts/discourse/components/wizard-realtime-validations.js.es6
@@ -2,9 +2,25 @@ import Component from "@ember/component";
 import EmberObject from "@ember/object";
 import { cloneJSON } from "discourse-common/lib/object";
 import Category from "discourse/models/category";
+import discourseComputed from "discourse-common/utils/decorators";
+import I18n from "I18n";
 
 export default Component.extend({
   classNames: ["realtime-validations"],
+  @discourseComputed
+  timeUnits() {
+    return [
+      "days",
+      "weeks",
+      "months",
+      "years"
+    ].map((unit) => {
+        return {
+          id: unit,
+          name: I18n.t(`admin.wizard.field.validations.time_units.${unit}`)
+        }
+      });
+  },
 
   init() {
     this._super(...arguments);
diff --git a/assets/javascripts/discourse/templates/components/wizard-realtime-validations.hbs b/assets/javascripts/discourse/templates/components/wizard-realtime-validations.hbs
index fe053bc3..39734761 100644
--- a/assets/javascripts/discourse/templates/components/wizard-realtime-validations.hbs
+++ b/assets/javascripts/discourse/templates/components/wizard-realtime-validations.hbs
@@ -22,13 +22,15 @@
         </div>
         <div class="validation-section">
           <div class="setting-label">
-            <label>{{i18n 'admin.wizard.field.validations.date_after'}}</label>
+            <label>{{i18n 'admin.wizard.field.validations.max_topic_age'}}</label>
           </div>
           <div class="setting-value">
-            {{date-picker-past
-                value=(readonly props.date_after)
-                containerId="date-container"
-                onSelect=(action (mut props.date_after))}}
+            {{input type="number" class="time-n-value" value=props.time_n_value}}
+            {{combo-box
+                value=(readonly props.time_unit)
+                content=timeUnits
+                class="time-unit-selector"
+                onChange=(action (mut props.time_unit))}}
           </div>
         </div>
         <div class="validation-section">
diff --git a/assets/javascripts/wizard/components/similar-topics-validator.js.es6 b/assets/javascripts/wizard/components/similar-topics-validator.js.es6
index 2625cdf2..3b63fafb 100644
--- a/assets/javascripts/wizard/components/similar-topics-validator.js.es6
+++ b/assets/javascripts/wizard/components/similar-topics-validator.js.es6
@@ -124,7 +124,8 @@ export default WizardFieldValidator.extend({
     this.backendValidate({
       title: this.get("field.value"),
       categories: this.get("validation.categories"),
-      date_after: this.get("validation.date_after"),
+      time_unit: this.get("validation.time_unit"),
+      time_n_value: this.get("validation.time_n_value")
     }).then((result) => {
       const similarTopics = A(
         deepMerge(result["topics"], result["similar_topics"])
diff --git a/assets/stylesheets/common/wizard-admin.scss b/assets/stylesheets/common/wizard-admin.scss
index a06c19e2..389de55c 100644
--- a/assets/stylesheets/common/wizard-admin.scss
+++ b/assets/stylesheets/common/wizard-admin.scss
@@ -680,3 +680,13 @@
 .wizard.category-selector {
   width: 200px !important;
 }
+
+.time-n-value {
+  width: 70px;
+  vertical-align: middle;
+}
+
+.select-kit.time-unit-selector {
+  width: 80px;
+  vertical-align: middle;
+}
diff --git a/config/locales/client.en.yml b/config/locales/client.en.yml
index 8b3d4e66..47b2aa5b 100644
--- a/config/locales/client.en.yml
+++ b/config/locales/client.en.yml
@@ -184,7 +184,12 @@ en:
             above: "Above"
             below: "Below"
             categories: "Categories"
-            date_after: "Date After"
+            max_topic_age: "Max Topic Age"
+            time_units:
+              days: "Days"
+              weeks: "Weeks"
+              months: "Months"
+              years: "Years"
           
           type:
             text: "Text"
diff --git a/lib/custom_wizard/realtime_validations/similar_topics.rb b/lib/custom_wizard/realtime_validations/similar_topics.rb
index 29425f5b..3323a2ee 100644
--- a/lib/custom_wizard/realtime_validations/similar_topics.rb
+++ b/lib/custom_wizard/realtime_validations/similar_topics.rb
@@ -21,8 +21,9 @@ class CustomWizard::RealtimeValidation::SimilarTopics
     title = params[:title]
     raw = params[:raw]
     categories = params[:categories]
-    date_after = params[:date_after]
-        
+    time_n_value = params[:time_n_value]
+    time_unit = params[:time_unit]
+
     result = CustomWizard::RealtimeValidation::Result.new(:similar_topic)
     
     if title.length < SiteSetting.min_title_similar_length || !Topic.count_exceeds_minimum?
@@ -31,7 +32,11 @@ class CustomWizard::RealtimeValidation::SimilarTopics
 
     topics = Topic.similar_to(title, raw, user).to_a
     topics.select! { |t| categories.include?(t.category.id.to_s) } if categories.present?
-    topics.select! { |t| t.created_at > DateTime.parse(date_after) } if date_after.present?
+
+    if time_n_value.to_i > 0 && time_unit.present?
+      topics.select! { |t| t.created_at >= time_n_value.to_i.send(time_unit).ago }
+    end
+
     topics.map! { |t| SimilarTopic.new(t) }
     
     result.items = topics
diff --git a/spec/components/custom_wizard/realtime_validations/similar_topics_spec.rb b/spec/components/custom_wizard/realtime_validations/similar_topics_spec.rb
index e76b7fdb..7d871d45 100644
--- a/spec/components/custom_wizard/realtime_validations/similar_topics_spec.rb
+++ b/spec/components/custom_wizard/realtime_validations/similar_topics_spec.rb
@@ -30,12 +30,12 @@ describe ::CustomWizard::RealtimeValidation::SimilarTopics do
     expect(result.items.length).to eq(1)
   end
 
-  it "filters topics based on created date" do
-    topic.update!(created_at: 1.day.ago)
+  it "filters topics based on Max Topic Age setting" do
+    topic.update!(created_at: 23.hours.ago)
     cat_topic.update!(created_at: 2.days.ago)
 
     validation = ::CustomWizard::RealtimeValidation::SimilarTopics.new(user)
-    result = validation.perform({ title: "matching similar", date_after:  1.day.ago.to_date.to_s })
+    result = validation.perform({ title: "matching similar", time_n_value: 1, time_unit: "days" })
     expect(result.items.length).to eq(1)
   end
 end