diff --git a/app/models/sfo_case.rb b/app/models/sfo_case.rb
index 201137137..9cc8ac183 100644
--- a/app/models/sfo_case.rb
+++ b/app/models/sfo_case.rb
@@ -1,8 +1,10 @@
 class SfoCase < Document
   validates :sfo_case_state, presence: true
+  validates :sfo_case_opened_date, allow_blank: true, date: true
 
   FORMAT_SPECIFIC_FIELDS = %i[
     sfo_case_state
+    sfo_case_opened_date
   ].freeze
 
   attr_accessor(*FORMAT_SPECIFIC_FIELDS)
diff --git a/app/views/metadata_fields/_sfo_cases.html.erb b/app/views/metadata_fields/_sfo_cases.html.erb
index e1c1f452e..146ea777d 100644
--- a/app/views/metadata_fields/_sfo_cases.html.erb
+++ b/app/views/metadata_fields/_sfo_cases.html.erb
@@ -1,3 +1,5 @@
+<%= render layout: "shared/date_fields", locals: { f: f, field: :sfo_case_opened_date, format: :sfo_case,  label: "Opened date" } do %>
+<% end %>
 <%= render layout: "shared/form_group", locals: { f: f, field: :sfo_case_state, label: "Case state" } do %>
     <%= f.select :sfo_case_state, facet_options(f, :sfo_case_state), {}, { class: 'form-control' } %>
 <% end %>
\ No newline at end of file
diff --git a/lib/documents/schemas/sfo_cases.json b/lib/documents/schemas/sfo_cases.json
index 550e1fbec..c004bc8c1 100644
--- a/lib/documents/schemas/sfo_cases.json
+++ b/lib/documents/schemas/sfo_cases.json
@@ -34,6 +34,14 @@
           "value": "closed"
         }
       ]
+    },
+    {
+      "key": "sfo_case_opened_date",
+      "name": "Opened date",
+      "short_name": "Opened date",
+      "type": "date",
+      "display_as_result_metadata": true,
+      "filterable": true
     }
   ]
 }
\ No newline at end of file
diff --git a/spec/features/creating_a_sfo_case_spec.rb b/spec/features/creating_a_sfo_case_spec.rb
index 737ef6cef..356161ff9 100644
--- a/spec/features/creating_a_sfo_case_spec.rb
+++ b/spec/features/creating_a_sfo_case_spec.rb
@@ -30,6 +30,7 @@
     fill_in "Summary", with: "This is the summary of an example sfo case"
     fill_in "Body", with: "## Header#{"\n\nThis is the long body of an example life saving maritime appliance service station" * 2}"
     select "Closed", from: "Case state"
+    fill_in "Opened date", with: "2023-01-01"
 
     expect(page).to have_css("div.govspeak-help")
     expect(page).to have_content("To add an attachment, please save the draft first.")
@@ -57,6 +58,7 @@
           ],
         "metadata" => {
           "sfo_case_state" => "closed",
+          "sfo_case_opened_date" => "2023-01-01",
         },
         "max_cache_time" => 10,
         "headers" => [
@@ -108,6 +110,7 @@
     fill_in "Title", with: "Example sfo Case"
     fill_in "Summary", with: "This is the summary of an example sfo case"
     fill_in "Body", with: "<script>alert('hello')</script>"
+    fill_in "Opened date", with: "invalid_date"
 
     click_button "Save as draft"
 
@@ -118,5 +121,6 @@
 
     expect(page).to have_content("There is a problem")
     expect(page).to have_content("Body cannot include invalid Govspeak")
+    expect(page).to have_content("Opened date is not a valid date")
   end
 end
diff --git a/spec/models/sfo_case_spec.rb b/spec/models/sfo_case_spec.rb
index 51d88f3aa..ed3e32076 100644
--- a/spec/models/sfo_case_spec.rb
+++ b/spec/models/sfo_case_spec.rb
@@ -15,9 +15,24 @@
       expect(sfo_case).to be_valid
     end
 
+    it "is valid if the opened date is missing" do
+      sfo_case.sfo_case_opened_date = nil
+      expect(sfo_case).to be_valid
+    end
+
+    it "is valid if the opened date is a valid date" do
+      sfo_case.sfo_case_opened_date = "2023-01-01"
+      expect(sfo_case).to be_valid
+    end
+
     it "is invalid if the case state is missing" do
       sfo_case.sfo_case_state = nil
       expect(sfo_case).not_to be_valid
     end
+
+    it "is invalid if the opened date is not a valid date" do
+      sfo_case.sfo_case_opened_date = "invalid_date"
+      expect(sfo_case).not_to be_valid
+    end
   end
 end