validate the rest of the date fields

app/validations/date_validations.rb

@@ -1,7 +1,21 @@
 module DateValidations
   def validate_property_major_repairs(record)
-    if record.mrcdate.is_a?(ActiveSupport::TimeWithZone) && record.mrcdate.year.zero?
-      record.errors.add :mrcdate, "Please enter a valid date"
+    date_valid?("mrcdate", record)
+  end
+
+  def validate_tenancy_start_date(record)
+    date_valid?("startdate", record)
+  end
+
+  def validate_sale_completion_date(record)
+    date_valid?("sale_completion_date", record)
+  end
+
+private
+
+  def date_valid?(question, record)
+    if record[question].is_a?(ActiveSupport::TimeWithZone) && record[question].year.zero?
+      record.errors.add question, "Please enter a valid date"
     end
   end
 end