diff --git a/lib/pleroma/web/common_api/utils.ex b/lib/pleroma/web/common_api/utils.ex
index 40cea3090..9cd8b3758 100644
--- a/lib/pleroma/web/common_api/utils.ex
+++ b/lib/pleroma/web/common_api/utils.ex
@@ -15,6 +15,8 @@ defmodule Pleroma.Web.CommonAPI.Utils do
   alias Pleroma.Web.Endpoint
   alias Pleroma.Web.MediaProxy
 
+  require Logger
+
   # This is a hack for twidere.
   def get_by_id_or_ap_id(id) do
     activity =
@@ -240,15 +242,21 @@ defmodule Pleroma.Web.CommonAPI.Utils do
     Strftime.strftime!(date, "%a %b %d %H:%M:%S %z %Y")
   end
 
-  def date_to_asctime(date) do
-    with {:ok, date, _offset} <- date |> DateTime.from_iso8601() do
+  def date_to_asctime(date) when is_binary(date) do
+    with {:ok, date, _offset} <- DateTime.from_iso8601(date) do
       format_asctime(date)
     else
       _e ->
+        Logger.warn("Date #{date} in wrong format, must be ISO 8601")
         ""
     end
   end
 
+  def date_to_asctime(date) do
+    Logger.warn("Date #{date} in wrong format, must be ISO 8601")
+    ""
+  end
+
   def to_masto_date(%NaiveDateTime{} = date) do
     date
     |> NaiveDateTime.to_iso8601()
diff --git a/test/web/common_api/common_api_utils_test.exs b/test/web/common_api/common_api_utils_test.exs
index e04b9f9b5..f0c59d5c3 100644
--- a/test/web/common_api/common_api_utils_test.exs
+++ b/test/web/common_api/common_api_utils_test.exs
@@ -153,4 +153,40 @@ defmodule Pleroma.Web.CommonAPI.UtilsTest do
       assert conversation_id == object.id
     end
   end
+
+  describe "formats date to asctime" do
+    test "when date is in ISO 8601 format" do
+      date = DateTime.utc_now() |> DateTime.to_iso8601()
+
+      expected =
+        date
+        |> DateTime.from_iso8601()
+        |> elem(1)
+        |> Calendar.Strftime.strftime!("%a %b %d %H:%M:%S %z %Y")
+
+      assert Utils.date_to_asctime(date) == expected
+    end
+
+    test "when date is a binary in wrong format" do
+      date = DateTime.utc_now()
+
+      expected = ""
+
+      assert Utils.date_to_asctime(date) == expected
+    end
+
+    test "when date is a Unix timestamp" do
+      date = DateTime.utc_now() |> DateTime.to_unix()
+
+      expected = ""
+
+      assert Utils.date_to_asctime(date) == expected
+    end
+
+    test "when date is nil" do
+      expected = ""
+
+      assert Utils.date_to_asctime(nil) == expected
+    end
+  end
 end